Product Features 1.The resolution 2000, three choices from five kinds of DPI, three kinds of DPI with different corresponding indicating lights 2. Single unlimited firepower keys, improve game pass rate, comfortable hand feeling 3. 45 powerful self-defining keys with 9 groups each having 5 keys, every key with more than 40 kinds of self-defining function ; 4. Backlights can be adjusted, two choices of single color and six colors, three adjusting ways of breathe, full light and light-off ; 5. Roller wheel backlight 6. Standard seven keys and roller-up keys and roller-down key can self-define function 7. Driver with four kinds of return rate: 125, 250, 500, 1000Hz Specification 1. Connector: Wired USB 2.0/1.1 2. Transmission system: laser 2. Mouse size: 126.5(L) x 91.5(W) x 41.5(H) /- 0.5 mm 3. Mouse weight: 162 /- 5g (include inner fixed weight block) ; 4. Resolution: 2000DPI 4. Key NO. : 7(DPI, forward, backward, firepower key) ; 5. Key force: 0.8 mm 6. Actuation Force: 65 /- 5g 7. Key life: 5 million ; 8. Rated voltage/current: DC 5V/ <100MA Compatible with 1. Operating system Windows XP/Windows Vista/Windows 7/Windows 8 2. 50 MB available hard disk space Package include 1 x FOM AULA GHOST SHARK 400-2000 DPI Wired USB Expert Gaming Mouse - Black 1 x CD-ROM drive ; 1 x User guide