... % brand new, high quality -Two-way high-speed 2.4G wireless mouse smooth and flexible-Works at distance of up to 10 ... 2 (NOT included) -Dimensions: 9.5 x 6.5 x 3.5 cm-Compatible with Windows 98, ME, 2000, XP, VISTA ... , FCC safety test Package Contents1 x Wireless Mouse 1 x Receiver Specifications:Wireless carrier frequency: 2402MHz - 2480MHz 16 wireless working channels, automatic frequency jumping ...