4 buttons: Left click button, right click button, middle wheel scrool and DPI button.The fast wireless mouse is rated at 1200 DPI, which allows for precise, quick, and smooth movement.This cordless mouse provides an ergonomic and ambidextrous design that specializes in a higher arch for maximum comfort.Easy to install: Intelligent connectivity, no need to code, insert & play. Can joint with the mouse pad better,move smoothly and positioning accuracy.Advanced 2.4GHz Wireless - Stable connection, precise track, fast data transmission speed. Up to 30ft / 10m working distance, eliminates delays, dropouts and interference.Specifications:Material: plastic.Size: 108x75x38 mm.Color: show as pictures.Wireless Technology:2.4GHz.Wireless Distance: 10m.Button number:4.Engine: Optical.DPI: 1200DPI.Power Supply: 2 * AAA battery (Not Included).Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package include:1 * Wireless Mouse.1 * USB Receiver.