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