1. Introduction
Thank you for choosing the MOFii 666 Wireless Keyboard and Mouse Set. This set combines a unique mixed-color design with ergonomic comfort and reliable 2.4GHz wireless technology, providing a seamless and aesthetically pleasing computing experience. This manual will guide you through the setup, operation, and maintenance of your new wireless peripherals.
2. FCC Compliance and Safety Information
Information to User
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 this equipment 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 separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
3. Product Overview
This MOFii wireless keyboard and mouse set features a unique mixed-color keycap design, offering both aesthetics and comfortable typing. It operates via a 2.4GHz wireless connection, sharing a single USB receiver for a clean desktop setup. The keyboard has 110 full-size keys, including a numeric keypad and multimedia functions. The mouse is ergonomically designed to fit the palm comfortably.

MOFii Wireless Keyboard and Mouse Set in Pink, showcasing its unique mixed-color keycaps and ergonomic design.
Keyboard Features
- Full-size 110 keys, including a numeric keypad.
- Mixed-color chocolate-shaped keycaps for a unique look and comfortable feel.
- Ergonomic design with a 6-degree included angle for smoother operation and faster typing.
- Intelligent sleep mode for energy efficiency.

Full-size 110-key keyboard layout with integrated numeric keypad.

Ergonomic design of the keyboard with a 6-degree included angle for comfortable typing.
Mouse Features
- Left button, right button, and scroll wheel.
- Ergonomic design to fit the entire palm comfortably.
- 1200DPI precision sensor for stable output.
- Integrated storage slot for the USB receiver.

Ergonomic design of the mouse for a comfortable grip, reducing hand fatigue.

Mouse equipped with 1200DPI precision sensor for stable output.
Multimedia Function Keys (Keyboard)
The keyboard features dedicated multimedia function keys (F1-F12) that can be toggled with the FN key.
| Key | Function |
|---|---|
| F1 | Previous Track |
| F2 | Play/Pause |
| F3 | Next Track |
| F4 | Mute |
| F5 | Volume Down |
| F6 | Volume Up |
| F7 | Homepage |
| F8 | Search |
| F9 | |
| F10 | Favorites |
| F11 | Save |
| F12 | Set up |
4. Setup Instructions
Battery Installation
- Mouse Battery: Remove the battery compartment cover on the rear side of the mouse. Insert 1 AA battery with the correct polarity (observe the plus/+ and minus/- markings). Once connected, the LED on the bottom of the mouse will light up.
- Keyboard Battery: Remove the battery compartment cover on the bottom of the keyboard. Insert 1 AAA battery with the correct polarity (observe the plus/+ and minus/- markings). Once connected, the keyboard can be used properly.
USB Receiver Connection
- Take out the USB receiver from the rear side of the mouse and plug it into an available USB port on your computer. The keyboard and mouse share one receiver.
- When not using or transporting the set, please remove the nano receiver from the USB port and insert it into the receiver storage slot on the mouse to prevent loss.

Plug-and-play functionality with a single USB receiver for both keyboard and mouse.

Keyboard uses 1 AAA battery, and the mouse uses 1 AA battery (batteries not included).
5. Operating Instructions
Basic Usage
Once the batteries are installed and the USB receiver is plugged into your computer, the keyboard and mouse are ready for use. No additional drivers are required.
Multimedia Function Key Toggle
To switch between the standard F1-F12 keys and their multimedia functions, press the FN + ESC keys simultaneously. For example, if the multimedia function is active, pressing F7 will open your browser's homepage. If the standard F-key function is active, pressing F7 will perform its default F7 action.
Indicator Lights
- Caps Lock Indicator LED: Lights up when Caps Lock is active.
- Low Battery Indicator / 2.4G Connection Indicator LED: Indicates low battery status or 2.4G connection status.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | MOFii |
| Model Number | 666 |
| Type | ERGONOMIC, Wireless |
| Keyboard Connection | Wireless (2.4GHz) |
| Mouse Connection | Wireless (2.4GHz) |
| Interface | USB (via single receiver) |
| Supports Human Engineering | Yes |
| Keyboard Battery | 1 x AAA (not included) |
| Mouse Battery | 1 x AA (not included) |
| Mouse DPI | 1200 |
| Keyboard Keys | 110 |
| Keyboard Dimensions | 443mm x 138mm |
| Mouse Dimensions | 96mm x 55mm |
| Product Weight | 0.934 kg |
| Origin | Mainland China |

Dimensions of the MOFii wireless keyboard (443mm length, 138mm width) and mouse (96mm length, 55mm width).
7. Troubleshooting
Connectivity Issues
- No connection: Ensure both the keyboard and mouse have fresh batteries installed with correct polarity. Verify that the USB receiver is securely plugged into a working USB port on your computer. Try a different USB port.
- Interference: If you experience intermittent connection or erratic behavior, try moving the keyboard and mouse closer to the USB receiver. Ensure there are no large metal objects or other wireless devices operating on the same frequency nearby. Refer to the FCC compliance section for further steps regarding radio interference.
Functionality Issues
- Multimedia keys not working: Press FN + ESC simultaneously to toggle between standard F-key functions and multimedia functions.
- Mouse cursor erratic: Ensure the mouse sensor is clean and free from obstructions. Try using the mouse on a different surface.
8. User Tips
- For optimal comfort during long typing sessions, utilize the keyboard's ergonomic 6-degree angle.
- To conserve battery life, the keyboard and mouse feature a smart sleep mode. Remember to remove the nano receiver from the USB port and store it in the mouse's receiver slot when not in use or during transport to prevent loss.
- The mixed-color keycaps are not just for aesthetics; they are designed for durability and to resist fading.
9. Warranty and Support
For any issues not covered in this manual or for further assistance, please contact MOFii customer support. Keep your purchase receipt for warranty claims.
For a comprehensive guide and additional details, please refer to the User Manual (PDF) available at: MOFii Wireless Keyboard & Mouse Set User Manual (PDF).





