feature: 2.4GHz Wireless Optical Mouse For Laptop 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 Power Supply: 1 x AA Battery(Not included) Mouse type: Wireless Optical Mouse Interface: USB