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