Computer Accessory Sets features: HXSJ T21 2.4GHz Bluetooth 3.0 6-keys Wireless 2400DPI Four-speed Adjustable Optical Gaming Mouse for Desktop Computers / Laptops Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Specification: 1. Ergonomic optical mouse. 2. Wireless technology: Bluetooth 3.0, multi-platform connectivity and compatibility. 3. Wireless distance: 10m. 4. Rated voltage / current: 3V / 8mA. 5. Power: 2 AAA batteries (not included). 6. Number of keys: 6 keys. 7. Optical resolution: 2400dpi adjustable (800/1200/1600/2400). 8. Color: Black. 9. Work: Photoelectricity. 10. Button click life: 5 million times. 11. Material: ABS. 12. Product weight: 68g. 13. Project size: 10.5x7x4cm. 14. System Requirements: Windows 98 / Me / 2000 / XP / Vista / Win 7 / Win8 / 10 / Vista Mac OS or the latest version. Note: 1. A desktop computer requires a Bluetooth receiver to use. 2. Apple phones are not supported. Bluetooth connection method: 1. Open the mouse battery cover, load 2 AAA batteries (not included), and close the battery cover (please note the front and back of the battery slot). 2. Turn the mouse ON (the on/off button at the bottom of the mouse) to switch. 3. Turn on the mouse power switch directly. 4. Then search for the Bluetooth device directly in the add device. 5. Click to connect the Bluetooth mouse and the device has been successfully added to this computer. Package Included: Bluetooth mouse x 1 User Manual x 1