Mouse type: Wireless Optical MouseInterface: USBButton: 5 Buttons + 1 Scroll WheelSupports: Windows 2000/XP/Vista/ME/Win 7/Win 8 etc.2.4GHz Free moving in 10 metersfor Nano super Mini receiverPlug-and-Play Built-in storage medium,no need re-code after you replace batteryResolution frequency 800-1200 DPIBuilt-in Mini receiver designPower On/OFF functionPower Supply: 2x 1.5 V AAA Batteries (Not Included)Energy saving technologyLow-Voltage alarming functionOperation spam will be affected greatly due to using environmentBattery life spam will be different,depending on personal habit of using mice Specifications:Size: 100 x 60 x 35 mmNet weight: 55gColor: Silver-Black Package contents:1x Wireless 2.4G mouse1x Nano USB receiver