Keychron K4 Bluetooth Mechanical Keyboard User Manual

Keychron K4 Bluetooth Mechanical Keyboard

Dear customer,
Thank you for purchasing our product. Please read the following instructions carefully before first use and keep this user manual for future reference. Pay particular attention to the safety instructions. If you have any questions or comments about the device, please contact the customer line.

• ✉ www.alza.co.uk/kontakt
• ✆ +44 (0)203 514 4411
• Importer Alza.cz a.s., Jankovcova 1522/53, Holešovice, 170 00 Prague 7, www.alza.cz

In The Box

• Keychron K4 Bluetooth Mechanical Keyboard 1x
• Type-C cable * 1
• Manual * 1
• Quick Start Guide * 1
• Extra Keycaps Set * 1

Quick Start Guide

If you are a Windows user, please find the appropriate keycaps in the box, then follow the instructions below to find and replace the following keycaps.

Mac / Windows

Connect Bluetooth

Press fn + 1 (for 4 seconds) and pair with device named Keychron K4.

Connect Cable

Change Light Effect

• Press light effect key
• For RGB version – Press fn + right arrow / left arrow to change color.

Switch Between Function and Multimedia Keys (F1-F12)

• For Windows: Press fn + X + L (for 4 seconds) to switch.
• For Mac: Go to system settings > Keyboard > and enable the function keys.
  For F5 & F6 as function keys press fn + K + C (for 4 seconds) and use same shortcut to switch.

Disable Auto Sleep Mode

• The keyboard goes to Auto Sleep Mode in 10 minutes of sitting idle to save battery.
• Press fn + S + O (for 4 seconds) to disable the Auto Sleep Mode.

Remap keys

We don’t have an official software to remap the keys yet. But you can use these two software to get the job done. (Expect the light effect key.)

Linux Setting

We have a Linux user group on Facebook. Please search “Keychron Linux Group” on Facebook. So you can better experience with our keyboard.

Turn Off the Backlight

If you are on the Mac, the default is to press F5 key. If you are on the Windows, the default is to press fn + F5 key.
Or press the fn + light effect key.

Factory Reset

Trouble shooting? Don’t know what’s going on with the keyboard? Try factory reset by pressing fn + J + Z (for 4 seconds)

K4 Bluetooth Mechanical Keyboard Specifications

• Number of keys 100
• Switch type Mechanical / Optical Switch
• Battery 4000mAh
• Working time Around 70 hours with the backlight on
• Charging time Around 3 hours
• Charging port USB Type-C
• Mode Bluetooth / Wired
• Bluetooth operating distance Within 10 meters (open space)
• Name of Bluetooth device Keychron K4
• Operating Environment -10 to 50°C

Technical specifications can be subjected to change without notice we apologize for any inconvenience caused.

**Overview

**

1. Charging port
2. Win/Android Mac/iOS (OS Toggle Switch)
3. BT OFF Cable (Mode Toggle Switch)

LED Status Overview

Battery indicator

| ****

Charging

| Low battery – Blinking Red Charging – Static Red Fully charged – Static

Green

Bluetooth indicator| Bluetooth| Pairing – Fast Blinking Paired – Light Off

Switching – Slow Blinking

Function Description

Charging

Plug the cable into a USB port and plug the other end into the keyboard port. Charging indicator: When battery is below 15%, a red battery blinking indicator will be triggered. A red light will stay on while charging; Fully charged in around 3 hours, a green battery indicator will appear.
The Keychron keyboard is compatible with all USB ports. Please use a 5V 2A adapter or USB 3.0 for the best performance. The Keychron K4 can be charged in Bluetooth/on/off mode. **This product supports up to 5V charging voltage and 2A charging current. We are not responsible for any problems caused by improper charging.

Bluetooth/Wired Mode

(Toggle Switch)

Wired Mode

• Switch the toggle switch to Cable option (it only works when USB cable is plugged in).
• Connect our cable with your PC and keyboard.
• Backlit will be turned on.

Under Wired Mode, keyboard will not enter into Battery Saver Mode

Bluetooth Mode

1. Switch the keyboard to Bluetooth option.
2. Backlit will be turned on.
3. Hold “Fn+1” key for 4 seconds to activate Bluetooth pairing (the Bluetooth indicator fast flashes for 3 minutes to detect pairing.)
4. Search for the Bluetooth device “Keychron K4” on your device and connect it (the Bluetooth indicator goes off after successful pairing.)

Note: This keyboard supports pairing up to 3 devices simultaneously via combination key “fn” + “1” / “fn” + “2” / “fn” + “3”. *The Bluetooth indicator will continue to flash for 3 minutes. ** Slow or failed connections may exist due to different Bluetooth versions, please make sure all the settings are correct.

Switch Bluetooth devices

Short press combination key “fn” + “1” / “fn” + “2” / “fn” + “3” to switch to another device.

Reconnect:

1. Switch the keyboard to the Bluetooth option to activate the keyboard (the keyboard will connect to the last connected device by default).
2. The Bluetooth indicator flashes for 4 seconds and automatically pairs with the last paired device.
3. If the Bluetooth indicator is off, press any button to enter the connection again.

The keyboard must have been paired with the device to perform this function.

Turn off the keyboard

• Switch to “Off”

Battery Saver

Under Bluetooth mode, the keyboard backlight turns off when it is inactive for 10 minutes. Tap any button to wake the keyboard. If want to disable this auto battery save mode, press fn+S+O for 4 seconds. Then if want to enter this power save mode again, press fn+S+O+ for 4 seconds

Backlit Setting

• Short press to switch between different types of lighting effects.
• When backlit is on, press button to switch among them. Short press fn and “left arrow” or fn and “right arrow” adjust light colours. (For RGB version only)

OS Switch

MAC/iOS

Turn the switch to Mac/iOS when you are connected to a Mac or iOS operating system.

Windows/Android

Switch the toggle to Windows/Android when the keyboard is connected to a Windows or Android operating system.
When using the Windows/Android mode, keys are used for “Windows” and “Alt” functions.

Input Method Switch

For iOS: Input method switch: Ctrl + Space Caps Lock: Caps (Enable General > Keyboard > Hardware Keyboard> Caps Lock Language Switch)

For Android: Input method switch: Shift + Space

NOTE: Functions of certain multimedia key be disabled due to compatibility, versions, brands, and drivers of Windows/Android OS. We also recommend not to switch OS frequently as it may impact keyboard operations

Troubleshooting
If unable to pair keyboard to device, confirm that the device you’re trying to pair with is Bluetooth-capable. If so, restart the device and try pairing it when with the keyboard again.
Note: On a Windows computer, a new Bluetooth connection will sometimes require additional software updates-a process that may still be ongoing after a message appears indicating a successful completion. Wait at least 20 minutes after pairing to make sure all updates are competed before restarting computer.
Confirm that the device is configured to accept Bluetooth connections (Windows) and supports an external keyboard (HID profile).

Go to Bluetooth Devices > Open Settings and select the following:

• Allow Bluetooth devices to find this computer
• Allow Bluetooth devices to connect to this computer
• Alert me when a Bluetooth device wants to connect

My keyboard isn’t working.

For the keyboard:

• Turn the keyboard odd and back on.
• Turn Bluetooth off and restart the computer (Windows)

For the device:

• Go to Bluetooth settings and turn off Bluetooth and “forget” the keyboard.
• Restart the device and turn on Bluetooth reconnect.

Bluetooth connection is interrupted even within 10 meters.

Check if the keyboard is resting on a metal surface that can interface with the Bluetooth signal.

Third party input tools are not compatible with the keyboard.

Due to compatibility, version, brands and drivers of Windows/Android OS, function of third-party input tools may be affected while using the keyboard. Please make sure your operating system and drivers are up to date.

Certain fn keys or multimedia keys does not work under Windows/Android mode.

Functions of certain multimedia keys may be disabled due to compatibility, versions, brands, and driver of Windows/Android OS.

Safety Precaution:

• Keep the product, accessories, and packaging parts out of reach of children to prevent any accidents and choking hazards.
• Always keep the product dry to avoid corrosion.
• Do not expose the product to extreme temperatures below -10°C (5°F) or above 50°C (131°F) to preserve the lifespan of the keyboard and battery

Warranty Conditions

A new product purchased in the Alza.cz sales network is guaranteed for 2 years. If you need repair or other services during the warranty period, contact the product seller directly, you must provide the original proof of purchase with the date of purchase.

The following are considered to be a conflict with the warranty conditions, for which the claimed claim may not be recognized:

• Using the product for any purpose other than that for which the product is intended or failing to follow the instructions for maintenance, operation, and service of the product.
• Damage to the product by a natural disaster, the intervention of an unauthorized person or mechanically through the fault of the buyer (e.g., during transport, cleaning by inappropriate means, etc.).
• Natural wear and aging of consumables or components during use (such as batteries, etc.).
• Exposure to adverse external influences, such as sunlight and other radiation or electromagnetic fields, fluid intrusion, object intrusion, mains overvoltage, electrostatic discharge voltage (including lightning), faulty supply or input voltage and inappropriate polarity of this voltage, chemical processes such as used power supplies, etc.
• If anyone has made modifications, modifications, alterations to the design or adaptation to change or extend the functions of the product compared to the purchased design or use of non-original components.

EU Declaration of Conformity

Identification data of the manufacturer’s / importer’s authorized representative:

Importer: Alza.cz a.s.
Registered office: Jankovcova 1522/53, Holešovice, 170 00 Prague 7
CIN: 27082440

Subject of the declaration:

Title: Bluetooth Mechanical Keyboard
Model / Type : K4

The above product has been tested in accordance with the standard(s) used to demonstrate compliance with the essential requirements laid down in the Directive(s):
Directive No. 2014/53/EU
Directive No. 2011/65/EU as amended 2015/863/EU

WEEE

This product must not be disposed of as normal household waste in accordance with the EU Directive on Waste Electrical and Electronic Equipment (WEEE – 2012/19 / EU). Instead, it shall be returned to the place of purchase or handed over to a public collection point for the recyclable waste. By ensuring this product is disposed of correctly, you will help prevent potential negative consequences for the environment and human health, which could otherwise be caused by inappropriate waste handling of this product. Contact your local authority or the nearest collection point for further details. Improper disposal of this type of waste may result in fines in accordance with national regulations.

References

• Alza.cz – rychlý a pohodlný nákup odkudkoliv | Alza.cz
• Alza.sk – rýchly a pohodlný nákup odkiaľkoľvek | alza.sk
• Alza | Alza.co.uk
• Alza.cz – rychlý a pohodlný nákup odkudkoliv | Alza.cz
• Alza.cz
• alza.de
• alza.hu
• alza.sk

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