Features:Wireless USB Optical MouseTracking method: OpticalIntelligent network functionsInterface: USB 2.0High Resolution:1600-2000DPIMouse Power : 2 �� AAA Batteries (not included)System Compatibility: for Windows 98 / for ME / for NT / for 2000 / for XP / for Vista / Win 7 / for Linux or for Mac OSSpecifications:Weight:78gPackage weight:88gSize:105 x 70 x 36mmColor: Black Package Included:1 x Wireless USB Optical Mouse1 x USB receive