Feature: 1. 2.4GHz Wireless: This wireless mouse is connected to 2.4GHz wireless technology through a USB receiver, the transmission distance can attain 10 meters, plug and play, no driver required, widely compatible with laptops, PCs, desktops. 2. 1600 DPI: 800, 1600 DPI is enough to meet your work and life needs, support automatic sleep, no connection sleep more power saving, suitable for Windows 95, for Windows 98, for NT, for ME, for Win 2000, for XP, for Vista, for Windows 7, for Win8 3. Ergonomic Design: The wireless mouse is ergonomically designed to perfectly match the position of each of your fingers, and the mini contoured shape can significantly reduce muscle strain by 30%. 4. 6 Buttons: This computer mouse has 6 buttons, side buttons, forward and back buttons to help you browse the web conveniently, tested over 5,000,000 keystrokes for a long lifespan. 5. Battery Powered: This wireless computer mouse is powered by a battery, with smart power saving technology, with a battery life of up to six months (battery life depends on different usages and devices). Specification: Item Type: Wireless Optical Mouse Material: ABS Operating Frequency: 2.4GHz Wireless Distance: Approx. 10meter / 10.9yd Resolution: 800, 1600 DPI Keys: 6 Keys Battery: AAAx2 (Battery Not Included) Applies To: For Windows 95, for Windows 98, for NT, for ME, for Win 2000, for XP, for Vista, for Windows 7, for Win8. Package List: 1 x Wireless Mouse1 x USB Receiver