... 3.style : compter accessory 1.1computer accessory for 3d optical mouse specification1.usb interface,plug and play 2.High resolution: 800DPI 3.best ... 3d optical mouse FeaturesModel Numbertdh20 IC:8732 , 2700 , 3405 , 3512 Key-press life:3,000,000 Scanning Speed:1500-3000/secondStyle3D, Computer Interface:USB ...