Feature:<br /> tTracking systems: Optical.<br /> tDPI: 1600DPI.<br /> tUltra-precise Scroll Wheel.<br /> tOptical technology works on most surfaces.<br /> tErgonomically designed・ long-term use without fatigue.<br /> tIntelligent connectivity・ no need to code・ plug & play.<br /> tSwitch Life: 5 million cycle.<br /> tSize: 120(L) x 72(W) x 35(H)mm.<br /> tColor:Black<br /> tWeight: about 70g.<br /> tCompatible with Windows XP・ Vista・ Windows 7・ ME・ 2000 and Mac OS...or latest.<br />Package Content:<br /> t1 X Gaming Mouse (without retail package)<br /><br />