Features: Brandnewandhighquality. Verticalergonomicdesignperfectlyfitsthenaturalcontourofthewristandthepalm. Specialdesignedfingerslot. Twooptionsforleft-handerandright-hander. 3adjustableDPIlevelstocustomizeyourgameplayexperience4008001600 Opticallasertechnologyforprecisecontrol. IthasL/Rmousebuttons2thumbbuttonsandaclickablescrollwheel. Rechargeablebuilt-inbatterywillneverrequirebatteriesandwillbemoreconvenientandpracticalforyoutouse. Built-inironmakingcenterofgravitymorestable. Comfortablehand-holdingpostureofthisproductincreasesthecontrolfrequencyofyourmiceremovesoccupationalcarpaltunnelsyndrome. Professionallydesignedforofficestaffandgamers.Therightleftandrollerkeysareuniquelydeignedonthesidewhichwillmakeyourhandunderthemostrelaxingstateduringusing.Thusitreducesthefatigueofthehand. Specifications: Color:blackblack&blueblack&purpleblack&silvergrey Size:102x72x82mm Connectionmethod:Wireless DPI:1600 Connectionport:USB2.0 Button:left/rightbuttonrollerbuttonforward/backbuttonmiddle(on/off)button. Wirelessrange:about10m Rating:5V10mA Chargingtime:about2hours Compatiblewith:Win98/2000/XP/VISTA/7/8/MAC Netweight:116g Packageincludes: 1xWirelessErgonomicVerticalUSBMouse(batteryisincluded) 1xUSBcable