Features:2.4GHz wireless transmission up to 10 meters operating distance.7 buttons， including Wheel Key， Left Button， Right Button， Page up， Page down， DPI Switcher， Fire Button.With a special Fire Button: don't need double clicks in intense and exciting games such as CS， CF， etc.1000/1600/2000dpi adjustable.Matte-design on the left & right buttons， and rear area.Precision， Comfort and Control.Decent and fashionable.Intelligent connectivity， no need to code， plug-and play.Great power saving mode， low power comsuption， the service life of one AA Alkaline battery is up to 3 months.Specifications:RF carrier: 2.4-2.4835GHzWireless transmission distance: Up to 10mOperation systems: Windows 98， 2000， XP， Vista， Win 7Power: 1 x AA battery (not included)Rated operation current: 22mA， 1.5VColor: Black + Gray (as shown in the pictures)Mouse size: 117 x 77 x 40mmUSB receiver size: 19 x 14 x 5 mmMouse weight: 91gReceiver weight: 2gPackage size: 208 x 170 x 50 mmPackage weight: 176gPackage including:1 x 2.4G Wireless Mouse1 x USB Receiver1 x User Manual