Black 3D 2.4G USB Optical Wireless Mouse Operation systems:Windows 2000,Me,XP,Vista,Win 7 DPI Accurate rate ... USB OpticalSpeicifications: RF carrier: 2402-2480MHzRF operation channel: 16, auto frequency hoppingUSB: USB 2.0Operation systems: Windows 2000, Me, XP, Vista, ... Win 7Power: 1 * AA battery (not included)Rated operation current:15mA, 1 ...