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