Perman Portable 2.4GHz Wireless Optical Gaming Mouse Mice + USB Receiver for Computer PC Laptop Gamer Black Mouse type: Wireless Optical Mouse. Interface: USB. Size: 95*54*30mm. Resolution: 400-1600CPI conversion. Power Supply: 2 x AAA Battery(Not included) With 6 Keys, including Scroll Wheel, Page Forward and Page Backward buttons for easy Internet Surfing. Mini adapter Plug and play. Portable and weight light, very convenient to carry and store. Power switch for save power. Wireless transmission, the longest sensing distance up to 10-15 meters. Up to 10 meters of operating distance.