Keychron K8 Bluetooth Mechanical Keyboard User Guide

Keychron K8 Bluetooth Mechanical Keyboard


  • Keychron K8 Bluetooth Mechanical Keyboard x 1
  • Type-C Cable * 1
  • Manual * 1
  • Quick Start Guide * 1
  • Extra Keycaps Set * 1

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.

1. Connect Bluetooth
2. Connect Cable
3. Change Light Effect
4. Switch Between Function and multimedia Keys (F1-F12)

5. Disable Auto Sleep Mode

6. 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. (Except the light effect key)Linux’s SettingWe have a Linux user group on facebook. Please search “Keychron Linux Group” on facebook. So you can better experience with our keyboard.

7. Turn off the Backlight

8. Activate Siri/ Cortana


  • Number of keys: 87
  • 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 K8
  • Operating Environment: -10 to 50°cTechnical specifications can be subjected to change without notice we apologize for any inconvenience caused.


  1. Charging indicator
  2. Bluetooth indicatov
  3. Caps Lock indicator
  4. Charging port
  5. Win/Android Mac/iOS (OS Toggle Switch)
  6. BT OFF Cable (Mode Toggle Switch)


LED Location Function Status

Battery indicator



Low battery – Blinking Red Charging – Static Red

Fully charged – Static Green


Bluetooth indicator



Pairing – Fast Blinking Paired – Light Off Switching – Slow Blinking


CHARGINGPlug 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 indicater will be triggered. A red light will stay on while charging; Fully charged in around 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 perf ormance. The Keychron K8 can be charged in Bluetooth/on/off mode.

** This product supports up to 5V charging voltage and 2A charging current. We are not responsible f or any problems caused by improper charging.


WIRED MODE1. Switch the toggle switch to Cable option (it only works when a USB cable is plugged in).2. Connect our cable with your PC and keyboard.3. Backlit will be turned on.*Under Wired Mode, keyboard will not enter into Battery Saver Mode.

BLUETOOTH MODE1. 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 KS” on your device and connect it (the Bluetoothindicator goes off after successful pairing).

Note: This keyboard supports pairing up to 3 devices simultaneously via combination key“fn” + •1 • I “fn” + “2” I “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.


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


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 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.


Switch to “Off”


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.


  • 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” to adjust light colors. (For RGB version only)

OS SWITCH1- MAC/iOSTurn the switch to Mac/iOS when you are connected to a Mac or iOS operating system.

2 – WINDOWS/ANDROIDSwitch 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.

3 – INPUT METHOD SWITCHFor iOS:Input method switch: Ctrl + SpaceCaps Lock: Caps (Enable General>Keyboards>Hardware Keyboard>Caps Lock Language Switch)

For Android:Input method switch: Shift+ Space

NOTE: Functions of certain multimedia key may be disabled due to compatibility, versions, brands and drivers of Windows/Android 05. We also recommend not to switch 05 frequently as it may impact keyboard operations.


If unable to pair keyboard to device, confirm that the device you’re trying to pair with isBluetooth-capable. If so, restart the device and try pairing it with the keyboard again.

Note: On a Windows computer, a new Bluetooth connection will sometimes require additionalsoftware 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 completed before restarting the computer.

Confirm that the device is configured to accept Bluetooth connections external keyboard (HID profile).

Go to Bluetooth Devices > Open Settings and select the following:Allow Bluetooth devices find to this computerAllow Bluetooth devices to connect to this computerAlert me when a Bluetooth device wants to connect

My keyboard isn’t working.For the keyboard: Turn the keyboard off 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 to reconnect.

Bluetooth connection is interrupted even within 10 meter.Check if the keyboard is resting on a metal surface that can interfere with the Bluetooth signal.

Third party input tools are not compatible with the keyboard.Due to compatibility, versions, brands and drivers of Windows/Android OS, functions ofthird 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, brandsand drivers 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.


FCC DECLARATION OF CONFORMANCEThis device complies with part 15 of the FCC Rules. Operation is subject to the following twoconditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular installation. If thisequipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the distance between the equipment and receiver.
  • Plug the equipment into an outlet on a circuit different from that to which the receiver iscurrently using.
  • Consult the dealer or an experienced radio/TV technician for help.

The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure condition without restriction.

Keychron, Inc.Dover, DE 19901, United StatesFind us at:https://www.keychron.comFacebook @keychronInstagram @keychron

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Twitter @keychronMKDesigned by KeychronMade in China



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