Using Bluetooth 3.0 version of the transmission technology, transmission distance of up to 10 meters 2400DPI Adjustable high-definition optical sensor Fluent hands common design Bluetooth 3.0, multi-platform connection and compatibility Open the mouse battery cover, load 2 * AA batteries (not included), close the battery cover (please note the positive and negative direction of the battery slot marked) Switch the mouse 'ON', the on/off button at the bottom of the mouse Press at the same time the left key, right key and the scroll wheel for 5 seconds. Red light will be on to indicate Bluetooth mode opening Search the mouse in Bluetooth device and connect to it Note: If your device is not Bluetooth enabled, please use with a Bluetooth adapter Does not support Apple mobile devices, such as: Apple's mobile phone and Apple iPad Specification Project Type: Ergonomics Optical Mouse PRODUCT NAME: T21 Bluetooth Mouse Brand: HXSJ Wireless Technology: Bluetooth 3.0 Wireless distance: 10m Rated voltage / current: 3V/8mA Power supply: 2 * AA batteries (NOT included) Number of keys: 6 keys Optical resolution: 2400dpi Adjustable(800/1200/1600/2400) Work: Photoelectricity Button click life: 5 Million times Material: ABS Product weight: 68g Item size: 10.5*7*4cm System requirements: Windows 98 / Me / 2000 / XP / Vista / Win 7 / Win8 /10/Vista Mac OS or latest Package included: 1 x Bluetooth Mouse 1 x User Manual