Portable Perman Cute Mini 2.4GHz Wireless 3 Buttons Optical Mouse Mice with USB Receiver for Computer PC Laptop Notebook Red Optical Resolution: 2000 (dpi). Dimensions (L / B / H): 8.5 x 5.3 x 2.7cm. Mouse type: Wireless Optical Mouse. Power Supply: 1 x AAA Battery (Not included) Mini adapter Plug and play. Interface: USB. Up to 10 meters of operating distance. With 3 Keys, including Scroll Wheel, Page Forward and Page Backward buttons for easy Internet Surfing. Wireless transmission, the longest sensing distance up to 10-15 meters. Portable and weight light, very convenient to carry and store. Power switch for save power.