E-blue EMS112BK. Device interface: USB, Movement detection technology: Optical, Purpose: gaming. Power source: cable. Operating temperature range (T-T): -15 - 45 °C, Operating relative humidity range: 90 - 95 %. Mouse dimensions (WxDxH): 81 x 112 x 37.5 mm, Mouse weight: 116 g. Compatible operating systems: Windows 98 Windows 2000 Windows ME Windows NT Windows XP Windows 7, Minimum system requirements: USB