Optical Desktop Mouse CLLM3BDESK Features:Compact flat design Simple Plug and Play installation Suitable for both left and right handed users Specifications:Connections / interfaces USB 2.0 Features Left/ Right handed Both Dpi settings 800 Color Grey USB powered Sensor type Optical Mouse buttons 3 Scroll wheel Physical Specifications Length (in mm) 114 Width (in mm) 28 Height (in mm) 54 Product Weight (in grams) 60 Others Operating system Windows XP Windows Vista Windows 7 Connections / interfaces Available USB port