Trust Forma Wireless Mouse. Device interface: RF Wireless, Movement detection technology: Optical, Movement resolution: 1000 DPI. Frequency range: 2.4 GHz, Wireless range: 8 m. Mouse weight: 0.1 kg. Package weight: 0.153 kg. Minimum system requirements: Windows 7, Vista, XP, Package dimensions (WxDxH): 115 x 50 x 160 mm