Trust Wireless Mini Travel Mouse. Device interface: RF Wireless, Movement detection technology: Optical, Movement resolution: 1000 DPI. Frequency range: 2.4 GHz, Wireless range: 8 m. Mouse weight: 72 g. Package weight: 0.114 kg. Compatible operating systems: Win Vista, XP, Minimum system requirements: Windows Vista or XP. USB port., Package dimensions (WxDxH): 128 x 49 x 172 mm