new design, 1000/1600DPI, 6 buttons, silver, black, ergnomics design, ITEM NO.:SI-938NAME: wireless mouseCONNECTOR:USBRESOLUTION:1000/1600cpiMouse button 6COLOR:silver,blackKEY LIFE:above 3000,000POWER SUPPLY: WORKING DISTANCE:10 meter Compatible with Windows ME/2000/XP/VistaPACKING:blister color boxMEANS 102(L)×67.5.(W)×36(H)±0.5mm