Feature:<br /> t100% brand new and high quality.<br /> tButtons: 7 buttons with scroll wheel.<br /> tTracking systems: Optical.<br /> tThe Max DPI: 5500DPI.<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 /> tBuilt-weight iron・ feel comfortable・ mobile and stability.<br /> tSwitch Life: 5 million cycle.<br /> tSize: 127(L) x 85(W) x 37(H)mm.<br /> tWeight: about 140g.<br /> tCompatible with Windows XP・ Vista・ Windows 7 8・ ME・ 2000 and Mac OS...or latest.<br /> tUser for: The high-end players・ gaming professional players.<br />Package Content:<br /> t1 X 5500DPI Gaming Mouse<br />