Perman Portable 3200DPI 2.4GHz Wireless Optical Gaming Mouse Mice with USB Receiver for Computer PC Laptop Notebook Black Size: 108x75x38 mm. Mouse type: Wireless Optical Mouse. Interface: USB. Mini adapter Plug and play. Power switch for save power. Resolution: 3200DPI conversion. Power Supply: 2 x AAA Battery (Not included) With 6 Keys, including Scroll Wheel, Page Forward and Page Backward buttons for easy Internet Surfing. Portable and weight light, very convenient to carry and store. Wireless transmission, the longest sensing distance up to 10-15 meters.