Introduction
The FMOUSE M109 is a compact and versatile 2-in-1 device, functioning as both a wireless Bluetooth mouse and a TF (MicroSD) card reader. Designed for portability, it includes an 8GB TF card and a Type-C to USB adapter, making it suitable for various computing environments and on-the-go use. This manual provides detailed instructions for its setup, operation, maintenance, and troubleshooting.

Image: The FMOUSE M109 Mini Portable 2-in-1 Wireless Bluetooth Mouse and TF Card Reader.
What's in the Box
Please check the package contents to ensure all items are present:
- 1 x 2-in-1 Bluetooth Mouse & TF Card Reader (FMOUSE M109)
- 1 x 8GB TF Card
- 1 x Type-C to USB Adapter
- 1 x Type-C Charging Cable (doubles as a lanyard)
- 1 x Instruction Manual

Image: The FMOUSE M109 mouse, 8GB TF card, Type-C to USB adapter, and Type-C charging cable/lanyard.
Setup
1. Charging the Mouse
Before first use, fully charge the mouse. Connect the included Type-C charging cable to the mouse's Type-C port and the other end to a USB power source (e.g., computer USB port, wall adapter). The charging indicator light will show charging status. A full charge typically takes 2-3 hours.

Image: The FMOUSE M109 connected to a charging cable via its Type-C port, with the Type-C to USB adapter shown.
2. Inserting the TF Card
Locate the TF card slot on the underside of the mouse. Gently insert the provided 8GB TF card (or another compatible TF card up to 2TB) into the slot until it clicks into place. Ensure the card is inserted in the correct orientation.

Image: The FMOUSE M109 showing the TF card slot and an inserted 8GB TF card.
3. Powering On and Bluetooth Pairing
- Locate the ON/OFF switch on the bottom of the mouse and slide it to the 'ON' position.
- On your device (laptop, phone, tablet), navigate to the Bluetooth settings.
- The mouse should appear as 'BTS 5.1 Mouse' or similar in the list of available devices. Select it to pair.
- If prompted, confirm the pairing. The mouse's indicator light may change to confirm a successful connection.

Image: The underside of the FMOUSE M109, highlighting the ON/OFF switch, DPI switch key, and Bluetooth reset button.
Operating Instructions
1. Mouse Functionality
Once paired, the FMOUSE M109 operates as a standard wireless mouse. It features left-click, right-click, and a scroll wheel for navigation.
2. Adjusting DPI (Sensitivity)
The mouse has an adjustable DPI switch key located on its underside. A single click of this button cycles through three DPI levels: 800, 1200, and 1600. Select the sensitivity that best suits your preference and task.
3. Bluetooth Reset
If you experience connectivity issues or wish to pair the mouse with a new device, you can reset the Bluetooth connection. Long press the DPI switch key on the bottom of the mouse until the indicator light flashes, signaling that the mouse is ready for a new pairing.
4. TF Card Reader Function
When the TF card is inserted into the mouse and the mouse is connected to a computer, it functions as a portable storage device. You can access the contents of the TF card directly through your computer's file explorer. The mouse supports TF cards up to 2TB capacity.

Image: The DPI switch key and Bluetooth reset function on the underside of the FMOUSE M109.
5. Using the Type-C to USB Adapter
The included Type-C to USB adapter allows for broader compatibility, enabling you to connect the mouse's Type-C charging cable (which doubles as a lanyard) to standard USB-A ports for charging or data transfer if needed.
6. Video Demonstration
Video: Official FMOUSE demonstration of the Mini 2-in-1 Bluetooth Mouse & TF Card Reader features and usage.
Maintenance
To ensure the longevity and optimal performance of your FMOUSE M109, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe the exterior of the mouse. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters the device. Avoid harsh chemicals or abrasive cleaners.
- Storage: Store the mouse in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the mouse frequently. Charge it when the battery is low. If storing for an extended period, charge it to about 50% every few months.
- TF Card Handling: Always eject the TF card safely from your computer before removing it from the mouse to prevent data corruption.
Troubleshooting
If you encounter issues with your FMOUSE M109, refer to the following common solutions:
| Problem | Possible Solution |
|---|---|
| Mouse does not turn on. | Ensure the ON/OFF switch is in the 'ON' position. Charge the mouse fully. |
| Mouse does not connect via Bluetooth. | Ensure Bluetooth is enabled on your device. Perform a Bluetooth reset on the mouse (long press DPI button). Remove previous pairings from your device and try pairing again. Ensure the mouse is charged. |
| TF card is not recognized. | Ensure the TF card is inserted correctly and fully into the slot. Try re-inserting the card. Test the TF card in another device if possible to rule out card issues. Ensure the mouse is connected to your computer. |
| Mouse movement is erratic or unresponsive. | Check the battery level and charge if necessary. Ensure the optical sensor on the bottom is clean and free of obstructions. Try adjusting the DPI setting. Ensure you are using the mouse on a suitable surface. |
Specifications
Key technical specifications for the FMOUSE M109:
- Brand: FMOUSE
- Model: M109
- Connectivity Technology: Bluetooth
- Movement Detection Technology: Optical
- DPI Levels: 800, 1200, 1600 (adjustable)
- Buttons: 3 (Left, Right, Scroll Wheel/Middle)
- Battery: 120mAh Built-in Lithium-ion battery
- Charging Port: Type-C
- TF Card Reader: Supports up to 2TB (8GB TF card included)
- Dimensions: 78 × 38 × 22 mm (3.07 × 1.49 × 0.87 inches)
- Weight: Approximately 30g (1.06 oz)
- Wireless Range: Up to 10 meters
- Compatible Devices: Laptops, phones, computers
- Operating Systems: Windows 7/8/10 or later, macOS 10.08 or later, Chrome OS, Android 5.0 or later
- Enclosure Material: Plastic

Image: The compact dimensions of the FMOUSE M109 mouse, measuring 3.07 x 1.49 x 0.87 inches.
Warranty and Support
Warranty Information
The FMOUSE M109 comes with a 2-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or normal wear and tear.
Customer Support
For technical assistance, warranty claims, or any questions regarding your FMOUSE M109, please contact FMOUSE Brand customer support. Refer to the contact information provided on the product packaging or the official FMOUSE website for the most up-to-date support channels.





