Wireless Mouse Havit HV-MS989GT, 800-1600dpi, 4 buttons, Ambidextrous, 1xAA, 2.4Ghz, Black/Red. Wireless technology: 2.4GHzWireless distance: 10mDimension: 104*58*37mmThe number of key: 4Resolution: 800-1200-1600DPI Key life: 1,000,000 timesPower supply: 1*AA(Alkaline batteries are recommended)