Creazy&reg; 2.4GHz 3200DPI Wireless Optical Gaming Mouse Mice For Computer PC Laptop 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) Size:108x75x38 mm