iTEC LaserTouch NANO 242. Device interface: RF Wireless, Movement detection technology: Laser, Movement resolution: 1600 DPI. Frequency range: 2.4 GHz, Wireless range: 10 m. Battery type: AAA. Mouse dimensions (WxDxH): 76 x 54 x 27 mm, Mouse weight: 47 g. Compatible operating systems: Microsoft Windows ME/2000/XP 32bit/Vista 32/64bit/7 32/64bit