System Requirements* The mouse is compatible with the standard Microsoft mode.* IBM compatible computer running Windows operating system and supporting USB devices.*If your computer does not have Bluetooth function, please purchase Bluetooth adapter first, this product does not include Bluetooth adapter. Main features* Variable CPI resolution, 1000, 1200, 1600CPI free switch;*Structural design conforms to ergonomic principles;*The built-in software solution conforms to the Bluetooth human interface device, and abides by the Bluetooth SIG Bluetooth2.0 version specification;* Support Windows 98/ME/2000/XP/VISTA operating system;*Using two 1.5V AAA alkaline batteries [commodity not equipped with batteries]*Frequency range: 2.4-2.4835;* Receiving sensitivity: -75dbm (standard)* Transmission distance: 10m;*Working environment: -10 degrees to 85 degrees;* Placement environment: 0 degrees to 55 degrees;*Humidity: 20%-50%. note:! The optical mouse cannot run on glass or mirror surface, please avoid using it on such media, otherwise this mouse may not work properly.! For power-saving considerations, it is recommended that you use an optical mouse on a bright and well-textured medium to obtain lower power consumption. Dark media surfaces may consume more power.! In order to obtain a better transmission distance, please avoid using this mouse on a metal surface. Use on metal surfaces will shorten the transmission distance.Mouse parametersSize and weight:Length: 9.4cmWidth: 5.4cmHeight: 3.5cm Mouse material: ABS power consumption:Rated voltage: 3V DCRated current: