Lenovo Optical Mouse The Lenovo Optical Mouse utilizes optical tracking technology for precision control. Features: Integrated wheel scrolling device No mousepad required; it works on many types of surfaces No mechanical ball to get dusty or dirty Full-size shape that fits comfortably in either hand Same mouse that is included with select ThinkCentre desktop systems Business Black color complements ThinkCentre and ThinkPad systems Scroll wheel also acts as programmable third mouse button Attaches via USB port Customize mouse function and operation via Lenovo Mouse Suite Specifications:Weight lbs: 0.20 g: 94 Height inches: 1.25 mm: 32 Width inches: 2.13 mm: 54 Depth inches: 4.5 mm: 114 Operating temperature between 0 degrees Celsius and 40 degrees Celsius between 32 degrees Fahrenheit and 104 degrees Fahrenheit Relative humidity Operating: between 8% and 80% Agency approvals UL 1950 /CSA 950 3rd Edition, March 1998 revision level CE (IEC 950 2nd Edition plus Amendments 1-4 (1996), and EN 60950 2nd Edition plus Amendments 1-4 (1997)) GS (Germany) NOM-019 (Mexico) BCIQ (Taiwan) FCC Class B Canada ICES-003 Class B; Canada NMB-003, Class B VCCI EMI for Korea C-Tick MOC Supported operating systems Microsoft Windows XP32 Windows Vista Windows 7 Windows 8