Features: 1.2.4GHz: Has 2.4GHz wireless data transmission, high anti interference performance, transmission distance of 10 meters. 2.3 Levels DPI Adjustable: 3 levels of DPI adjustable, 3 DPI (800, 1200, 1600) to freely change the mouse speed. 3.Broad Compatibility: Using sophisticated production technology, the wireless mouse supports for Windows XP, for Windows Vista, for Windows 2000 Server, for OS X. 4.Matte Texture: The wireless mouse has a matte texture, a slim, sweat proof and skin friendly finish to provide maximum comfort and support. 5.Long Service Life: The mouse has passed 5,000,000 keystroke tests to ensure durability and long service life. specification:Item Type: Wireless Mouse Material: ABS Wireless Transmission Distance: Approx. 10meters / 10.9yd Wireless Frequency: 2.4GHz Buttons: 6 Buttons (Scroll Wheel, Page Forward and Page Backward Button, Left and Right Mouse Button, DPI Adjustment Button) DPI: 800-1200-1600DPI Power: 2 AAA Batteries (Shipped Without Batteries) Mouse Type: Wireless Optical Mouse Interface: USB PackageList:1 x WirelessMouse 1 xSignal Receiver NoteShipped Without Batteries)