Microsoft Ergonomic Mouse USB Black Colour: Black Movement Detection: BlueTrack Number of Total Buttons: 5 Pointing Device Connectivity Technology: Cable Pointing Device Host Interface: USB 2.0 Type A Product Type: Mouse Scroller Type: Scroll Wheel Interfaces/Ports Pointing Device Host Interface: USB 2.0 Type A Physical Characteristics Colour: Black Depth: 117.6 mm Height: 42.2 mm Weight (Approximate): 104 g Width: 77 mm