Model Number:E25DPI: 800-1200-1600Button Number: 6DWorking distance: 10MBluetooth V3.0Feature:Ergonomic Color: black Material: ABS Features: 1. It is a wireless Bluetooth mouse that delivers a better mix of precision and comfort?awith designed-for-Web scrolling and a feel-good， contoured design.2. Ergonomic shape and soft rubber grips conform to your hand and feel naturally comfortable3. The mouse works seamlessly with Bluetooth-enabled laptops， Ultra portable PCs， and tablets without taking up a valuable USB port.4. Switchable DPI among 800-1200-1600 Dimension: about 113*72*39mm Buttons: Left， Right， Scroll wheel， DPI button， Forward， Backward Button lifespan: 8 million times Connection method: Bluetooth Battery type: 2 x AAA (not included) OS: W98/W2000/XP/VISTA/Win 7/Mac/Android How to connect: Put the battery into the mouse and then turn on the mouse. Press "Left， scroll wheel， and Right" buttons together and hold for 2-3 seconds， and then search on the device you want to connect. Note: If your device is not Bluetooth enabled， please use with a Bluetooth adapter. 1 x Mouse In original package