Logitech Cordless Optical Mouse (Black) 3-Button Logitech Cordless Optical Scroll Mouse General Features: Black design Cordless 3-buttons Scroll wheel acts as third button Up to 6 foot range Ergonomic design Operates on two AA batteries (not included) Regulatory Approvals: UL CE TUV/GS NOM MIC Gost-R C-Tick BSMI