V7 Wireless Keyboard & Mouse. Device interface: RF Wireless. Movement resolution: 800 DPI, Movement detection technology: Optical. Frequency band: 2.4 GHz. Keyboard dimensions (WxDxH): 402 x 170 x 24.5 mm, Keyboard weight: 0.67 kg, Mouse dimensions (WxDxH): 65 x 120 x 32 mm. Compatible operating systems: Windows 2000/ME/XP +