1. Introduction
The ZIYOU LANG K100 is a versatile 99-key wireless gaming keyboard designed for various computing environments. It features tri-mode connectivity (Bluetooth, 2.4GHz wireless, and USB-C wired), customizable RGB backlighting, a multimedia control knob, and an ergonomic design. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance.

Image 1.1: The ZIYOU LANG K100 Wireless Gaming Keyboard, showcasing its 99-key layout and integrated knob.
2. Package Contents
Please check the package for the following items:
- ZIYOU LANG K100 Wireless Gaming Keyboard
- USB-C to USB-A Cable
- 2.4GHz USB Receiver
- User Manual
3. Product Overview
The K100 keyboard offers a 90% layout (98 keys + 1 knob), providing a compact form factor while retaining essential keys like the numeric keypad and independent arrow keys. It features high-quality double-shot PBT keycaps for durability and resistance to wear.

Image 3.1: Close-up view of the gradient side-printed PBT keycaps, designed for long-lasting legibility.
The keyboard incorporates an ergonomic design with foldable two-stage feet, allowing for adjustable typing angles (7° and 9°) to enhance comfort during extended use. The 2.4GHz USB receiver is conveniently stored within the keyboard's base.

Image 3.2: The underside of the keyboard showing the integrated USB receiver storage slot and adjustable feet for ergonomic positioning.
4. Setup and Connectivity
The K100 keyboard supports three connection modes: USB-C wired, 2.4GHz wireless, and Bluetooth 5.0. Use the switch on the side of the keyboard to select your desired mode.

Image 4.1: Illustration of the keyboard's tri-mode connectivity options: Bluetooth, 2.4GHz wireless, and USB-C wired.
4.1. Wired Connection (USB-C)
- Connect the provided USB-C cable to the keyboard's USB-C port.
- Connect the other end of the cable (USB-A) to an available USB port on your computer.
- Set the mode switch on the keyboard to the 'Wired' position (usually indicated by a cable icon or 'USB-C').
- The keyboard will be recognized automatically by your system.
4.2. 2.4GHz Wireless Connection
- Locate the 2.4GHz USB receiver stored in the keyboard's base.
- Plug the USB receiver into an available USB port on your computer.
- Set the mode switch on the keyboard to the '2.4G' position.
- The keyboard should connect automatically. If not, press FN + 1 to initiate pairing.
4.3. Bluetooth Connection
The keyboard can connect to up to three Bluetooth devices simultaneously.
- Set the mode switch on the keyboard to the 'BT' position.
- To enter pairing mode for a specific channel, press and hold FN + 2, FN + 3, or FN + 4 for 3-5 seconds until the indicator light flashes rapidly.
- On your device (PC, Mac, Xbox, PS4, PS5, Android), search for Bluetooth devices and select 'K100' from the list.
- Once paired, the indicator light will stop flashing.
- To switch between paired Bluetooth devices, press FN + 2, FN + 3, or FN + 4 briefly.
5. Operating Instructions
5.1. Multimedia Knob Control
The integrated knob provides convenient control over multimedia functions and backlighting.

Image 5.1: Close-up of the multimedia knob and dedicated media keys for volume, play/pause, and track navigation.
- Rotate Knob: Adjust volume (clockwise for increase, counter-clockwise for decrease).
- Press Knob: Play/Pause media.
- FN + Knob Rotation: Adjust RGB backlight brightness or switch backlight modes (functionality may vary based on specific firmware or software settings).
5.2. RGB Backlight Control
The K100 keyboard features 16.8 million RGB colors with multiple dynamic effects and monochrome modes. Lighting brightness and speed can be adjusted.

Image 5.2: Key combinations for controlling the RGB backlight, including switching effects, solid colors, brightness, and speed.
- FN + INS: Switch between 15 different backlight effects.
- FN + DEL: Switch between solid backlight colors.
- FN + Backspace: Turn backlight On/Off.
- FN + PGUP: Increase backlight brightness.
- FN + PGDN: Decrease backlight brightness.
- FN + - / =: Control light effect speed.
5.3. 26-Key Anti-Ghosting
The keyboard supports 26-key anti-ghosting, allowing multiple key presses to be registered simultaneously without conflict. This feature is beneficial for gaming, ensuring accurate input during complex commands.
5.4. Macro Software
Macro software is available for customizing lighting setups and potentially remapping keys. Refer to the official ZIYOU LANG website for software downloads and instructions.
6. Charging and Battery
The K100 keyboard is equipped with a built-in 4000mAh battery, providing extended usage in wireless modes. Connect the USB-C cable to charge the keyboard.

Image 6.1: Information on the 4000mAh battery and power-saving features, including backlight off after 2 minutes of inactivity and deep sleep after 30 minutes in 2.4G/BT mode.
- The backlight will turn off after 2 minutes of inactivity to conserve power.
- The keyboard will enter a deep sleep mode after 30 minutes of inactivity in 2.4G or Bluetooth mode.
- In wired mode, power management follows the connected computer's sleep settings.
7. Compatibility
The ZIYOU LANG K100 keyboard is plug-and-play and does not require drivers. It is compatible with a wide range of operating systems and devices:
- Operating Systems: Windows XP/Vista/7/8/10, Mac OS, Android
- Devices: PC, Mac, Xbox, PS4, PS5, Laptops, Tablets (e.g., Samsung Galaxy Tab S7 FE 12.4")
8. Maintenance
- Keep the keyboard clean by regularly wiping it with a soft, dry cloth.
- Avoid exposing the keyboard to excessive moisture or extreme temperatures.
- Do not disassemble the keyboard, as this may void the warranty.
- The keycaps can be removed for cleaning, but be gentle to avoid damage.
9. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Keyboard not responding in wireless mode. | Ensure the keyboard is charged. Check the mode switch (2.4G or BT). For 2.4G, ensure the receiver is plugged in and try re-pairing (FN+1). For Bluetooth, ensure it's paired to the correct channel (FN+2/3/4) and try re-pairing. |
| Bluetooth connection unstable. | Ensure the keyboard is within range of the device. Check for interference from other wireless devices. Try re-pairing the Bluetooth connection. |
| RGB backlight not working or stuck. | Press FN + Backspace to toggle the backlight. Try cycling through modes with FN + INS. Adjust brightness with FN + PGUP/PGDN. |
| Keys are not registering correctly (ghosting). | The keyboard features 26-key anti-ghosting. If issues persist, try connecting via wired mode to rule out wireless interference. Ensure no software conflicts are present. |
| Multimedia knob not functioning. | Ensure the keyboard is properly connected. Try restarting the connected device. |
10. Specifications
| Feature | Detail |
|---|---|
| Brand | ZIYOU LANG |
| Model | K100 |
| Number of Keys | 99 |
| Connectivity Technology | 2.4GHz Wireless, Bluetooth 5.0, USB-C Wired |
| Keyboard Description | Membrane |
| Keycap Material | Double-shot PBT |
| Special Features | Backlit (RGB), Ergonomic, Rechargeable, Multimedia Knob, 26-Key Anti-Ghosting |
| Battery Capacity | 4000mAh |
| Compatible Devices | Laptop, PC, Tablet, Xbox, PS4, PS5 |
| Compatible OS | Win XP/Vista/7/8/10, Mac OS, Android |
| Material | Plastic |
11. Official Product Video
Video 11.1: An official product video demonstrating the ZIYOU LANG K100 Wireless Gaming Keyboard, highlighting its features such as gradient keycaps, multimedia knob, tri-mode connectivity, and RGB backlighting.
12. Warranty and Support
This product comes with a standard manufacturer's warranty. For detailed warranty information, technical support, or service inquiries, please refer to the warranty card included in your package or visit the official ZIYOU LANG website. Keep your purchase receipt for warranty claims.