Mouse type: Wireless, Optical Connector Type: USB Number of buttons: 3 Scroll Wheel: 1 Color: black and silver Other features: Resolution: 500/1000/2000 DPI Frequency: - 2400MHz, Range 10 meters, LED - Low Battery, On/Off button, Batteries - 2 x AAA, Battery life - 250h, dimensions 50x99x29 mm Acceleration: 2 g max , Low-Power Technology FHSS FSK Operating System: Microsoft ® Windows ® XP, Windows Vista ®, Windows ® 7 or Apple ® Mac ® OSX ™