Computer Mouse-START Mini portable 2.4Ghz Wireless Optical Gaming Mouse For PC Laptop-Black Interface: USB Color: Black Red Size: 130(L) x 71(W) x 43(H)mm. Weight: about 132g. Compatible with Windows XP, Vista, Windows 7, ME, 2000 and Mac OS...or latest. Mouse type: Wireless Optical Mouse Wireless transmission, the longest sensing distance up to 10-15 meters  Portable and weight light, very convenient to carry and store With 6 Keys, including Scroll Wheel, Page Forward and Page Backward buttons for easy Internet Surfing Power Supply: 2 x AAA Battery(Not included) Power switch for save power User for: The high-end players, gaming professional players. We have selected the fastest mail for you! About us:if you have any question,you can contact us,then we will solve it for you .More surprise product sold by "START"Please pay more attention to our company-www.amazon.com/shops/start_wuvi