Feature: 1. Type: Ergonomic optical mouse. 2. Resolution: 800dpi, 1600dpi, 2400dpi. 3. Buttons: 4 buttons and 1 wheel (middle button) and dpi (adjustable). 4. Wireless technology: Bluetooth 3.0 connection. 5. Maximum working range: 10 meters. 6. Rated voltage / current: 3V / 8mA. 7. Power: 2 AAA batteries (sold separately). 8. Material: ABS. 9. Button click life: 8 million times. 10. Size: 13x6.5x7.7cm. 11. Net weight: 87 grams. 12. System Requirements: Windows 98 / Me / 2000 / XP / Vista / Win 7 / Win8 / Win10 or latest version. Specification: 1. Bluetooth 3.0 wireless connection technology. 2. Ergonomically designed to relieve and prevent carpal tunnel syndrome. 3. Optical laser technology for precise control. 4. Choose the position that best suits your hand. Plug and play, compatible with Mac. Bluetooth connection method: 1. Turn on the mouse power switch directly. 2. Then search for the Bluetooth device directly in the add device. 3. Click to connect the Bluetooth mouse and the device has been successfully added to this computer Note: A desktop computer requires a Bluetooth receiver to use. Apple phones are not supported. Packing list: Mouse x 1 English User Manual x 1