The keyboard can connect to up to 3 devices at the same time. To switch between these devices, short press Fn + Z/X/C/V/Space.:

• Device 1: wired mode (USB)
• Device 2: Bluetooth mode (Fn + Z/X/C to pair)
• Device 3: 2.4 GHz mode (Fn + V to pair)
  
  * Important*: Keep Device 1 connected via USB at all times. Otherwise, you won’t be able to switch back to it.

● Press and hold Fn + V for 3–5 seconds. When the V key starts flashing quickly, the keyboard is in pairing mode.
● Plug the 2.4 GHz receiver into your computer’s USB port.
● When the V key stops flashing and the light goes off, the keyboard has successfully switched to 2.4 GHz mode.

● Press and hold Fn + Z , Fn + X , or Fn + C (depending on which channel you are connecting to) for 3–5 seconds. When the Z/X/C indicator flashes quickly, the keyboard is in pairing mode.
● Select the keyboard from your device’s Bluetooth list.
● Once connected, the indicator will stop flashing, and your keyboard is ready to use.

Connect the keyboard to your computer using the provided USB cable. The FN key indicator will flash green to indicate that the keyboard is charging.

Battery life may vary depending on:

• RGB brightness level
• Screen usage
• Connection mode (USB, Bluetooth, 2.4 GHz)

For longer battery life:

• Reduce the RGB brightness
• Enable sleep mode when the keyboard is not in use
• Heavy use of animations or high brightness will drain the battery faster.

1. On the keyboard screen
2. Via Bluetooth
3. When connected to a computer, the Bluetooth settings may show the battery level.
4. Using the keyboard buttons

• Make sure the keyboard is powered by the battery.
• Short press Fn + Backspace.
• While holding this key combo, the 1–0 key LEDs will light up green to show the battery level.
  o 1 = 10%
  o 2 = 20%
  o and so on until..
  o 0 = 100%
• Release the keys to stop displaying the battery level

When connected via USB, the keyboard automatically prioritizes USB mode and does not enter sleep mode.

When running on battery, the keyboard enters sleep mode after 10 minutes of inactivity by default. During sleep mode, the connection stays active, and pressing any key wakes it up.

Press and hold Fn + Caps for 5–8 seconds to enter deep sleep. The same operation or plugging in a USB cable wakes the keyboard.

You can configure the keyboard using the web driver: https://nd104.chilkey.com/connect .
Note: The web-based driver is currently only supported on Windows/macOS/Linux using Chrome or Edge. Make sure your keyboard is in wired mode connection.

1. Install “Wuque_toolbox.exe”.
2. Open the software. When prompted to install drivers, click “Yes” and
   wait for it to finish.
3. Select ND104in the DEV dropdown.
4. In the MCU section, click “Open”.
5. Find and select the ND104 firmware file, then click “Open”.
6. Click “Enter DFU” to start the update and wait until it completes.

Important tips:
● Make sure the keyboard is in wired (USB) mode and the connection is stable.

● Firmware can only be updated using Windows
● Only the ND104 USB cable should be connected—disconnect other USB devices.
● Do not operate the keyboard during the update.
● Firmware updates are safe if you follow these steps carefully. Only update when necessary, such as when improvements or fixes are released. Neither Chilkey nor MK are responsible for issues resulting from updating firmware.

Press and hold Space + Backspace for 3–5 seconds to restore factory settings.

The knob typically controls system volume by default. Knob functions can usually be customized through VIA.

• Turn the charging indicator light off/on: Short press Fn+M
• Turn the default startup lighting effect off/on: Short press Fn + Right Shift + L
• Turn the screen character display when pressing keys off/on: Short press Fn + Right Shift + Delete.

Use Fn+]} or Fn+Rshift+]} ) or the software to cycle through available lighting effects.

Use Fn+↑/↓ or Fn+Rshift+↑/↓ or the software to adjust brightness.

The keyboard screen can show:

• Clock
• Keyboard connection mode (USB, Bluetooth, 2.4 GHz)
• Caps Lock / Num Lock status
• System Layout
• Weather
• Animations
• Images
• Key characters

Open the keyboard web driver using Google Chrome or Edge.

• Upload your supported image or GIF files through the web driver.
• Once uploaded, the custom image/GIF will appear on your keyboard
  screen.

● Note:The web driver currently supports Windows and macOS only. Make sure your files are in a supported format and size for best results.

Image Upload Requirements

• Recommended image size: 320 × 172
• Maximum GIF frames: 60 frames
• File size limit: under 2 MB
• Only one image and one GIF can be uploaded.
• If multiple images are uploaded, the most recently uploaded file will
  overwrite the previous one.

After a full power-off reboot (keyboard without battery and USB re-plugged), the screen may randomly switch to a different page. To keep your default screen page, make sure the keyboard has a battery installed when restarting.

• Remove the keycap and check whether the switch is seated correctly or has any bent pins.
• Try replacing the switch with a spare switch.
• If this does not help, please contact the support team for further diagnosis.

For wired (USB) mode:

• Try a different USB cable.
• Try a different USB port on your computer.
• Try connecting the keyboard to another computer.
• Ensure the internal connector is properly seated. If you are not comfortable checking internal components, please contact our support team.

For Bluetooth mode:

• Check all 3 Bluetooth channels (Fn + Z/X/C) to see if any can be detected.
• Turn on Bluetooth on your phone to see if the keyboard appears in the list. If your phone can detect it, the keyboard itself is fine. If your computer still can’t see it, check if your computer supports Bluetooth properly or try another computer.

For 2.4 GHz mode:

• Make sure you follow the correct pairing steps: press Fn + V until the V key flashes quickly, then insert the 2.4 GHz receiver into your computer.
• Try a different USB port or another computer.
• Keep the receiver away from other USB receivers.
• Keep the keyboard close to the receiver and avoid physical obstacles in between.

• Reconnect the keyboard screen by opening the top case to disconnect and re-connect the screen connector.
• Make sure the keyboard has enough battery power.
• If the problem persists, try restarting the keyboard with the battery installed.
• If this does not help, take a photo/video of the issue and contact our
  support team for help.

• Remove the knob and check the pins on both sides of the knob for any obvious bending or misalignment. If the pins are pushed in, gently bend them outward a little.
• Reinstall the knob and press it firmly to ensure tight contact with the
  PCB. If this does not help, take a photo or video of the issue and contact
  our support team for help.

Updating the firmware may improve battery reporting accuracy.