Perman 1600DPI 2.4GHz Wireless Optical Mouse Mice with USB Receiver for Computer PC Laptop Gamer Red Size: 95 x 55 x 25 mm (L x W x H). DPI: 1600. Mouse type: Wireless Optical Mouse. Power Supply: 1 x AAA Battery(Not included). Interface: USB. Portable and weight light, very convenient to carry and store. Wireless transmission, the longest sensing distance up to 10-15 meters. Mini adapter Plug and play. With 3 Keys, including Scroll Wheel, Page Forward and Page Backward buttons for easy Internet Surfing.