Specification: Model: Rajoo V6 Wire:1.6M Ergonomics: support Interface of mouse:USB DPI mode: 800\/1200\/1600\/2400 Mouse Way of working: Optical Refresh rate: 6400 frames \/ sec The maximum acceleration: 15G Key Number of mouse: 6Key left key，right key，mouse wheel，DPI，Forward key，backward key Support system:W98 \/W2000\/ XP\/ VISTA\/ Win7\/ Mac Package included: 1 x mouse