OC 3 Foldable

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Application tips & expert knowledge
Product information, overview of accessories and operating instructions
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Scan the code on the packaging or download the KÄRCHER Home & Garden app from your app store and conveniently register your product.

Read this safety chapter and these operating instructions before using the device for the first time. Proceed accordingly. Keep the operating instructions for future reference or for future owners.

In addition to the notes in the operating instructions, you also need to take into consideration the general safety regulations and accident prevention guidelines applicable by law.
Warnings and information notices attached to the device provide important information for safe operation.

DANGER

Indication of an imminent threat of danger that will lead to severe injuries or even death.

WARNING

Indication of a potentially dangerous situation that may lead to severe injuries or even death.

CAUTION

Indication of a potentially dangerous situation that may lead to minor injuries.

ATTENTION

Indication of a potentially dangerous situation that may lead to damage to property.

DANGER

Never touch the charger and mains sockets with damp hands.

DANGER

Do not direct the spray jet directly onto consumables containing electrical components, e.g.the interior space of ovens.

WARNING

The device and the charger contain electrical components – do not clean the device and the charger under running water.

CAUTION

Before performing any care or maintenance work, switch off the device and unplug the charging cable from the device's charging socket.

DANGER

Danger of explosion. Do not charge non-rechargeable batteries.

DANGER

Do not charge the battery pack in an explosion-hazard environment.

DANGER

Do not insert any electrically conductive objects, e.g. screwdrivers or similar, into the charging socket of the device, the charger, or the plugs of the charging cable.

WARNING

Only charge the battery using the original charger enclosed or with a charger approved by KÄRCHER.

If no original charger is included, only charge the battery with a charger approved by KÄRCHER or a charger that complies with the specifications in the operating instructions and local standards.

WARNING

Only charge the battery with the supplied original charging cable, a charging cable approved by KÄRCHER, or a charging cable that complies with the specifications in the operating instructions and local standards.

WARNING

Do not open the charger. Repairs are only to be carried out by qualified personnel.

WARNING

Only use the charger to charge approved batteries.

WARNING

Unplug a damaged charger or charging cable immediately and do not use it.

Replace a damaged charger or charging cable immediately with original parts, parts approved by KÄRCHER, or parts that comply with the specifications in the operating instructions and local standards.

CAUTION

Unplug the charger from the mains socket as soon as the battery is fully charged.

CAUTION

Do not use the battery pack when dirty or wet.

CAUTION

Keep the charger ventilation slits free of obstructions.

CAUTION

Do not pull the charger out of the mains socket by the charging cable; instead, grip the charger.

CAUTION

Do not carry or pull the device or the charger by the charging cable.

ATTENTION

Do not kink, clamp, crush or stretch the charging cable to avoid damage.

Grasp the plugs to plug in and unplug the charging cable and do not pull on the charging cable.

ATTENTION

Protect the charging cable from heat, sharp edges, lubricants and moving parts.

ATTENTION

Only use and store the charger in dry rooms.

DANGER

Never touch contacts or lines.

DANGER

Batteries can be swallowed by children or persons with reduced physical, sensory or mental capabilities due to lack of experience or knowledge. Keep batteries out of the reach of children and these persons. Swallowing a battery is an emergency that requires immediate medical treatment.

DANGER

Do not expose the device and battery to strong sunlight, heat or fire.

DANGER

Danger of explosion. Do not charge non-rechargeable batteries.

WARNING

Do not charge any damaged batteries. Replace damaged or degraded batteries with batteries approved by KÄRCHER.

WARNING

Leaking battery fluid may cause skin irritation, burns, or eye damage. Batteries contain toxic substances that can cause health problems if swallowed or inhaled. Always wear gloves when handling a leaking battery to avoid skin contact. If the spilled liquid has come into contact with skin or eyes, rinse the affected areas immediately and thoroughly with water and seek medical advice.

WARNING

Short-circuiting the battery terminals (+/-) can lead to an explosion and ignition. Do not short-circuit the terminals (+/–) on the battery or the device. Do not store batteries in metal containers or with other metal parts.

CAUTION

Batteries contain hazardous substances that can cause serious environmental damage. Do not dispose of batteries with household rubbish, but properly at a collection point or recycling centre.

ATTENTION

Fully charge the battery before using the device for the first time.

ATTENTION

Remove used or defective batteries from the device and dispose of them according to local regulations.

ATTENTION

The battery compartment of the device is technically secured against accidental opening. Open and close the battery compartment as described in the operating instructions for the device.

ATTENTION

Do not use damaged or modified batteries.

ATTENTION

When installing batteries, ensure the correct polarity (+/-) according to the markings in the battery compartment or on the electrical plug connections.

WARNING

The device is not intended for use by children, persons with restricted physical, sensory or mental abilities or persons unfamiliar with these instructions.

WARNING

Persons with reduced physical, sensory or mental capabilities and persons lacking experience and knowledge may only use the appliance if they are properly supervised, have been instructed on use of the appliance safely by a person responsible for their safety, and understand the resultant hazards involved.

WARNING

Children and pets are not allowed to play with the device.

WARNING

Children and pets must be supervised to prevent them from playing with the device.

WARNING

Only use the device for its proper use. Take into account the local conditions and beware of third parties, in particular children, when working with the device.

WARNING

Adhere to the respective safety regulations in hazard zones (e.g. service stations). Never operate the device in explosive spaces.

WARNING

Do not spray any objects which contain harmful substances (e.g. asbestos).

WARNING

Risk of injury. Do not direct the spray jet onto the eyes.

CAUTION

Do not use the appliance if it has been dropped beforehand, is visibly damaged or if it is leaking.

CAUTION

Only operate or store the device in accordance with the description or figure.

CAUTION

Never leave the device unsupervised while it is in operation.

CAUTION

In order to guarantee stability, place the device on a firm, flat surface.

CAUTION

Accidents or damage due to the device falling over. Before all actions with or on the device, you must make sure that it is stable.

ATTENTION

Do not fill with any cleaning agents or other supplements.

ATTENTION

Device damage. Never fill the water reservoir with solvents, liquids containing solvents or undiluted acids (e.g. detergents, petrol, paint thinners and acetone).

ATTENTION

Device damage due to dry running. Only switch on the device when water is present in the water reservoir.

ATTENTION

Do not operate the device at temperatures below 0 °C.

	Do not immerse the device in liquids. Do not scoop any liquids.
	Use only certified chargers that comply with the specifications in the operating instructions and local standards.
	Only use the charger in dry rooms.

Use the low pressure cleaner in private households only.

The low pressure cleaner is intended for cleaning machines, vehicles, tools, façades, terraces, garden machines, pets etc. using a low-pressure water stream without additional detergents.

The packing materials can be recycled. Do not dispose of packaging as household rubbish but place it in recycling.

Electrical and electronic devices contain valuable recyclable materials and often components such as batteries, rechargeable batteries, battery packs and lubricants. These can pose a potential risk to health and the environment if handled or disposed of incorrectly. However, these components are required for the correct operation of the device. Devices marked by this symbol are not allowed to be disposed of together with the household rubbish.

Remove batteries, rechargeable batteries and battery packs from the old devices. The removal of these parts is described in the operating instructions. Dispose of the battery separately via suitable collection systems.

Cleaning work that produces oily waste water (e.g. engine washing, underbody washing), may only be carried out at washing stations with oil separators.

Work with detergents may only be carried out on liquid-tight work areas with a connection to the sewage system. Do not allow detergents to penetrate water or soil.

Water removal from public waters is not allowed in some countries.

Notes on the content materials (REACH)

Current information on content materials can be found at: www.kaercher.de/REACH

Only use original accessories and original spare parts. They ensure that the appliance will run fault-free and safely.

Information on accessories and spare parts can be found at www.kaercher.com.

The scope of delivery for the appliance is shown on the packaging. Check the contents for completeness when unpacking. If any accessories are missing or in the event of any shipping damage, please notify your dealer.

CAUTION

Risk of injury and damage due to missing or modified safety devices.

Injuries and material damage

Safety devices must not be bypass, removed or rendered ineffective. Safety devices are provided for your own protection.

The ON/OFF button prevents unintentional operation of the device.

If the trigger of the low pressure gun is released, the pressure switch turns off the pump and the low pressure stream is stopped. The pump switches on again when the trigger is pressed.

The motor circuit breaker shuts off the device if power consumption it too high.

Illustrations are examples, colours and details may vary.

Carrying handle
Clamp mount
Cover
Water reservoir
Fine filter
Charger
Charging cable
USB-C plug
USB-A plug
Battery compartment cover
Battery
Type plate
ON/OFF button
Charging socket cover
Charging socket
Charging state LED
Operating state LED
Nozzle
Low pressure gun
Trigger
Low pressure hose

Operating state LED		The device is switched on.
		Low battery voltage warning (approx. 2 minutes remaining).
		Malfunction, see Troubleshooting guide.
Charge state LED		The battery is being charged.
Charge state LED		The battery is fully charged.

Note

Use the supplied charger or a compatible, certified charger (SELV) with an output of 5.0 V DC and 2.0 A, 10.0 W.

Fully charge the battery before using the device for the first time.

When charging for the first time and if no original KÄRCHER charger is used, the specified charging time may vary.

Only charge the battery within the permissible temperature range.

Unfold the water reservoir, seeConnecting the water supply.
Charge the battery.
1. Release the charging socket cover on the device.
2. Plug the USB-C plug of the charging cable into the charging socket.
3. Plug the USB-A plug of the charging cable into the charger.
4. Plug the charger into a mains socket.
Note
The charging state LED flashes during the charging process. Once the battery is fully charged, it lights up for 10 minutes.
For the charging time, seeTechnical data.

After charging

Note

Avoid unnecessary energy consumption and unplug the charger from the mains socket once the battery is fully charged.

Pull the charger out of the mains socket.
Pull the USB-C plug out of the charging socket.
Press the charging socket cover firmly onto the device.

ATTENTION

Risk of damage due to improper water supply.

Damage to the device and accessories

Only fill the water reservoir with clean and clear water.Do not fill the water reservoir with detergents, pesticides, or other additives.Do not immerse the device in liquids.Do not scoop any liquids with the device.

Unfold the water reservoir:
1. Remove the lid from the water reservoir.
2. Keep the bottom of the water reservoir pressed down with your hand.
3. Pull the carrying handle upwards with the other hand.
Hang the lid on the water reservoir.
Remove the low-pressure gun and the low-pressure hose as far as possible from the water reservoir.
Fill clean and clear water into the water reservoir up to the "MAX" mark at the most.
Attach the lid to the water reservoir.
Note
Guide the low-pressure hose through the recess in the cover so as not to pinch it.
For one-handed transport, press the low-pressure hose on the carrying handle into the two clamp holders.

Place the device on a level, horizontal surface.

Various nozzles, brushes etc. are available as accessories for the device.

Removing the nozzle

Removing the nozzle on the low-pressure gun:
1. Press the nozzle into the low-pressure gun and loosen it by turning it 90°
2. and pull it off.

Installing accessories

Installing accessories on the low-pressure gun:
1. Press the accessory into the low-pressure gun
2. and fasten it by turning it 90°.
3. If present, tighten the lock nut hand-tight.

ATTENTION

Risk of damage if dry running.

Pump damage

Do not switch on the device if no water is present in the water reservoir.Switch off the device as soon as the water reservoir is empty.Switch off the device if it does not build up pressure within 2 minutes. Then proceed according to the instructions in Troubleshooting guide.

Press the ON/OFF button.

The device switches on.
CAUTION
Risk of injury from spray jet.
Injury to eyes and ears
Do not aim the spray jet at the eyes or ears of people or animals.

Pull the trigger and carry out the cleaning process.

Note

Approx. 2 minutes before the end of the operating time (see Technical data), the operating state LED starts flashing. Charge the battery as soon as possible, see Battery charging.

DANGER

Risk to life and health when handling cleaning agents.

Improper handling of detergents can lead to death and serious damage to health.

Observe the safety data sheet of the detergent manufacturer, in particular the instructions on personal protective gear.

ATTENTION

Risk of damage due to foreign substances in the water reservoir.

Damage to the device

Do not fill the water reservoir with detergents, pesticides, or other additives.

ATTENTION

Risk of damage from unsuitable detergents.

Material damage

Only use detergents that have been approved by KÄRCHER and are suitable for the objects to be cleaned.Observe the safety instructions, dosage recommendations and notes enclosed with the detergents.Use detergents sparingly.

ATTENTION

Risk of damage due to prolonged exposure and drying of detergents.

Material damage

Do not apply detergent to hot surfaces.Observe the maximum contact time.Do not allow detergent to dry on the surfaces being cleaned.

Note

KÄRCHER detergents ensure trouble-free, effective working. Please consult our detergent information sheets.

Spray the detergent sparingly on the dry surfaces and let it work for a while (do not let it dry).
ATTENTION
Risk of damage if dry running.
Pump damage
Do not switch on the device if no water is present in the water reservoir.Switch off the device as soon as the water reservoir is empty.Switch off the device if it does not build up pressure within 2 minutes. Then proceed according to the instructions in Troubleshooting guide.

Press the ON/OFF button.

The device switches on.
CAUTION
Risk of injury from spray jet.
Injury to eyes and ears
Do not aim the spray jet at the eyes or ears of people or animals.

Pull the trigger and carry out the cleaning process.

Note

Approx. 2 minutes before the end of the operating time (see Technical data), the operating state LED starts flashing. Charge the battery as soon as possible, see Battery charging.

Release the trigger.

After another 30 minutes without being pressed, the device shuts off automatically.

Press the ON/OFF button.
The device switches off.
Empty out the water remaining in the water reservoir.
Press the ON/OFF button.
The device switches on.
Actuate the trigger until no more water is emitted.
Release the trigger.
Press the ON/OFF button.
The device switches off.
Allow the water reservoir to dry completely.
Press the water reservoir down to fold it and make it smaller.
Stow the hose and the low-pressure gun in the water reservoir.
Stow the charger and the charging cable in the water reservoir.
Attach the lid to the water reservoir.

CAUTION

Risk of injury or damage due to the weight of the device.

Injuries and material damage

Be aware of the weight of the device during transport and storage.

ATTENTION

Risk of damage due to escaping water.

Material damage

Carry the device with care if water is present in the water reservoir. The lid of the water reservoir is not watertight.Empty the water reservoir completely before transporting the device in a vehicle.

Observe regulations for dangerous goods during transport.

Lift up the device by the carrying handle, and carry it.

CAUTION

Risk of injury and damage due to tipping or sliding of the device.

Injuries and material damage

Before transporting the device in vehicles, secure it against slipping and tipping over in accordance with the applicable guidelines.

Finish operation, see Ending operation.
Before transporting the device, stow it away or secure it against sliding, tipping and being thrown around.

CAUTION

Risk of injury or damage due to the weight of the device.

Injuries and material damage

Be aware of the weight of the device during transport and storage.

ATTENTION

Risk of damage due to frost.

Damage to the device and accessories

Empty the water completely from the device and accessories.Always protect the device and accessories from frost.

Finish operation, see Ending operation.
Place the device in a closed room on a flat surface and store it within the permitted ambient temperature, see Technical data.

DANGER

Danger of death due to electric shock.

Fatal or severe injury may occur when touching live electrical parts.

Do not touch any live parts.Switch off the device.Pull the charger out of the mains socket.

Switch off the device.
Unplug the charging cable from the device's charging socket.
Press the charging socket cover firmly onto the device.
Clean the device with a moist cloth.

Clean the fine filter regularly.

ATTENTION

Risk of damage when operating without a fine filter or with a damaged fine filter.

Damage to the device and accessories.

Check the fine filter for damage before installation. Replace a damaged fine filter immediately.Do not clean the fine filter with hard, pointed objects.Do not operate the device without a fine filter.

Switch off the device.
Unplug the charging cable from the device's charging socket.
Press the charging socket cover firmly onto the device.
Drain the water reservoir.
Pull out the fine filter.
Clean the fine filter with clean, flowing water against the direction of flow.
Fit the fine filter into the device.

Note

The battery has reached the end of its service life if the device constantly switches off after a short period of operation and the battery needs to be charged.

Please refer to Environmental protection.

Replace the battery at the end of its service life.

Remove the battery before disposing of the device.

Dispose of the battery separately from the device.

Removing the battery

Switch off the device, seeEnding operation.
Unplug the charging cable from the device's charging socket.
Press the charging socket cover firmly onto the device.
Removing the battery:
1. Unscrew the screws using a screwdriver.
2. Remove the battery compartment cover.
3. Take the battery out.
4. Disconnect the electrical socket plug connection.
Dispose of the battery in the correct manner.

Installing the battery

WARNING
Risk of explosion and fire if non-approved batteries or battery packs are used.
Severe injuries and/or material damage
Replace damaged and worn batteries or battery packs exclusively with batteries or battery packs approved by KÄRCHER.
Install a new battery in the reverse order.

DANGER

Danger of death due to electric shock.

Fatal or severe injury may occur when touching live electrical parts.

Do not touch any live parts.Switch off the device.Pull the charger out of the mains socket.

Malfunctions often have simple causes that you can remedy yourself using the following overview. When in doubt, or in the case of malfunctions not mentioned here, please contact your authorized Customer Service.

The device does not run.
Device does not reach required pressure.
Strong pressure fluctuations or constant switching off / on of the device.
The device is leaking.

Cause:

The charging state of the battery is too low.

Remedy:

Charge the battery, see Battery charging.

Cause:

The motor is overloaded, the motor circuit breaker has tripped.

Remedy:

Switch off the device.
Switch on the device and put it into operation.

Cause:

The ambient temperature is outside the permissible range, see Technical data, the motor circuit breaker has tripped.

Remedy:

Switch off the device.
Allow the device to cool down / heat up.
Switch on the device and put it into operation.
Have the device checked by KÄRCHER Service if this malfunction occurs repeatedly.

Cause:

Not enough water in the water reservoir.

Remedy:

Make sure that there is enough clean, clear water in the water reservoir.

Cause:

The fine filter is dirty.

Remedy:

Clean the fine filter, see Cleaning the fine filter.

Cause:

The nozzle is clogged.

Remedy:

To clean the nozzle: Remove contamination and debris from the nozzle hole, using a needle and rinse with clean, clear water from the front.
Make sure that there is enough clean, clear water in the water reservoir.

Cause:

Minor leakage due to technical reasons.

Remedy:

Minor leakage of the device can occur due to technical reasons and is not a cause for concern.

Cause:

Major leakage.

Remedy:

Contact the authorized Customer Service.

The warranty conditions issued by our relevant sales company apply in all countries. We shall remedy possible malfunctions on your appliance within the warranty period free of cost, provided that a material or manufacturing flaw is the cause. In a warranty case, please contact your dealer (with the purchase receipt) or the next authorised customer service site.

You can find more detailed information at: www.kaercher.com/dealersearch

Further warranty information (if available) can be found in the service area of your local KÄRCHER website under "Downloads".

EU Declaration of Conformity

We hereby declare that the product named below complies with the relevant provisions of the directives and regulations listed. This declaration is invalidated by any changes made to the product that are not approved by us. The manufacturer shall bear sole responsibility for issuing of this declaration of conformity.

Product: Mobile Outdoor Cleaner

Type: OC 3, OC 3 Plus, OC 3 Foldable, OC 4

Directives and Regulations

2006/42/EC (+2009/127/EC) (until 19/01/2027) (EU) 2023/1230 (from 20/01/2027)

2014/30/EU

2011/65/EU

2009/125/EC

2000/14/EC

2019/1782

(EU) 2023/1542

Harmonised standards used

EN 55014-1: 2017 + A11: 2020

EN 55014-2: 1997 + A1: 2001 + A2: 2008

EN 60335-1

EN 60335-2-54

EN 61000-3-2: 2014

EN 61000-3-3: 2013

EN 61558-1

EN 61558-2-16

EN 62233: 2008

EN IEC 63000: 2018

Applied conformity evaluation method

2000/14/EG: Annex V

Sound power level dB(A)

OC 3, OC 3 Plus

Measured: 81

Guaranteed: 84

OC 3 Foldable

Measured: 77

Guaranteed: 79

OC 4

Measured: 80

Guaranteed: 82

Name and address

Documentation supervisor:

S. Reiser

Alfred Kärcher SE & Co. KG

Alfred-Kärcher-Str. 28 - 40

71364 Winnenden (Germany)

Tel.: +49 7195 14-0

Fax: +49 7195 14-2212

Winnenden, 2026/03/01

The undersigned act on behalf of and with the authority of the Board of Directors.

Alfred Kärcher SE & Co. KG

Alfred-Kärcher-Str. 28 - 40

71364 Winnenden (Germany)

Ph.: +49 7195 14-0

Fax: +49 7195 14-2212

UK Declaration of Conformity

Product: Mobile Outdoor Cleaner

Type: OC 3, OC 3 Plus, OC 3 Foldable, OC 4

Directives and Regulations

S.I. 2008/1597 (as amended)

S.I. 2016/1091 (as amended)

S.I. 2012/3032 (as amended)

S.I. 2010/2617 (as amended)

S.I. 2001/1701 (as amended)

(EU) 2019/1782

Designated standards used

EN 55014-1: 2017 + A11: 2020

EN 55014-2: 1997 + A1: 2001 + A2: 2008

EN 60335-1

EN 60335-2-54

EN 61000-3-2: 2014

EN 61000-3-3: 2013

EN 61558-1

EN 61558-2-16

EN 62233: 2008

EN IEC 63000: 2018

Applied conformity assessment procedure

S.I. 2001/1701 (as amended): Schedule 8

Sound power level dB(A)

OC 3, OC 3 Plus

Measured: 81

Guaranteed: 84

OC 3 Foldable

Measured: 77

Guaranteed: 79

OC 4

Measured: 80

Guaranteed: 82

Name and address

Documentation supervisor:

S. Reiser

Alfred Kärcher SE & Co. KG

Alfred-Kärcher-Str. 28 - 40

71364 Winnenden (Germany)

Tel.: +49 7195 14-0

Fax: +49 7195 14-2212

Winnenden, 2026/03/01

The undersigned act on behalf of and with the authority of the Board of Directors.

Alfred Kärcher SE & Co. KG

Alfred-Kärcher-Str. 28 - 40

71364 Winnenden (Germany)

Ph.: +49 7195 14-0

Fax: +49 7195 14-2212

Electrical connection/Battery
Nominal voltage of battery	6 V
Nominal power of device	45 W
Protection type	IPX4
Protection class	III
Charger
Charger mains voltage	100-240 V
Output voltage	5 V
Output current	2 A
Phase	1 ~
Frequency	50-60 Hz
Protection class	II
Device performance data
Charging time for an empty battery	2,5 h
Operating duration with a fully charged battery	15 min
Operating pressure	0,5 MPa
Water reservoir capacity	8 l
Permissible ambient temperature	0-40 °C
Dimensions and weights
Length	298 mm
Width	305 mm
Height (water reservoir folded)	108 mm
Height (water reservoir unfolded)	271 mm
Weight (with accessories)	2,2 kg
Determined values in acc. with EN 60335-2-54
Hand-arm vibration a_hv	0,5 m/s²
Uncertainty Hand-Arm Vibration K	1,5 m/s²
Repeated shock vibrations p_F	14,1 m/s²
Uncertainty repeated shock vibrations K	4,3 m/s²
Sound level L_pA	64,2 dB(A)
Uncertainty sound pressure level K_pA	2,5 dB(A)
Sound power level L_wA	77 dB(A)
Guaranteed sound power level L_WA,d	79 dB(A)

2-2-SC-A5-GS-AW17339

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OC 3 Foldable

92222990 (06/26)

KÄRCHER Home & Garden App

Safety instructions

Hazard levels

DANGER

WARNING

CAUTION

ATTENTION

Risk of electric shock

DANGER

DANGER

WARNING

CAUTION

Charger

DANGER

DANGER

DANGER

WARNING

WARNING

WARNING

WARNING

WARNING

CAUTION

CAUTION

CAUTION

CAUTION

CAUTION

ATTENTION

ATTENTION

ATTENTION

Device with built-in battery

DANGER

DANGER

DANGER

DANGER

WARNING

WARNING

WARNING

CAUTION

ATTENTION

ATTENTION

ATTENTION

ATTENTION

ATTENTION

Safe handling

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

CAUTION

CAUTION

CAUTION

CAUTION

CAUTION

ATTENTION

ATTENTION

ATTENTION

ATTENTION

Symbols on the device / charger

Intended use

Environmental protection

Accessories and spare parts

Scope of delivery

Safety devices

CAUTION

ON/OFF button

Pressure switch

Motor circuit breaker

Overview of the device

Blink codes

Initial startup

Battery charging

Note

Note

Note