support system: Designed for Windows Vista, Windows XP, Windows 7 / 8 / 10, Linux, Android, Mac OS X (compatible with IMAC one machine / MacBook / MacBook Air / Mac Mini, not compatible macbook pro / ipad / iphone) * Bluetooth version: Bluetooth 5.0 * Photoelectric resolution: 3 adjustable DPI level (1000 / 1200 / 1600DPI) * Built in rechargeable battery: 1000mAh (lithium polymer battery, long cycle life) * Tracking system: optics * Number of keys: 4 (key) * Operating distance: 15 m * Size: 4.4 x 2.3 x 0.8 inches * Weight: 3.18 oz How to use the Bluetooth mouse: 1. Charge for 2 hours before first use, the blue light will be turned on when charging, the blue light is automatically turns off when fully charged. 2. When pairing turn on the Bluetooth mouse (switch to "on" position), press the black circle "Bluetooth connection button" More than 3 seconds. 3. Turn on the computer Bluetooth or pint the cursor toward the Bluetooth signal in the bottom right corner of the computer screen. Right click to select "add device", then the Bluetooth will enter the search state. (Note: Bluetooth normally has a Bluetooth logo in the lower right corner of the computer, if it normally starts.) 4. Wait for the computer to search interface into the Bluetooth device, the Bluetooth computer can search a mouse shape icon or "Bluetooth Mouse", that is the Bluetooth mouse, and then click next to start the match, the pairing is successful mouse begin work. Note: * If your device does not have Bluetooth, you need to install the Bluetooth adapter first. * If you do not use the mouse for a long time, turn off the "ON / OFF" switch. * It rarely occurs that the mouse has a connection problem, if the connection is not on try to delete of the current Bluetooth driver, and download and install the updated correct Bluetooth driver for your computer