new design, 1000/1600DPI, 3 buttons, black, ergnomics design, ITEM NO.:SI-929NAME:2.4g wireless mouseCONNECTOR:mini receiverRESOLUTION:1000/1600cpiMouse button 3COLOR:blackKEY LIFE:above 3000,000POWER SUPPLY:1 AA batteryWORKING DISTANCE:10 meter Compatible with Windows ME/2000/XP/VistaPACKING:blister color boxUnit G.W.:46gMEANS 102(L)×60(W)×35(H)±0.5mm