Specifications: 2.4GHz digital wireless transmission, operation distance is up to 10 meters. Built-in mouse memory, no recoding is needed after battery replacement. Intelligent power-saving technology, the service life of one alkaline battery is up to six months. Intelligent connectivity, no need to code, plug-and-play. Ergonomically designed, comfort grip. Dormant class control and more power-saving hibernation connectionless. 800dpi/1200dpi cursor speed adjustable. Shortcut button can be used to browse the Internet or applications, easily on the toolbar "forward" and "backward" function. Power switch, in the case of not using power off completely. Type: Wireless Optical Mouse Color: Black Interface: USB 1.1/2.0 RF: 2402MHz-2480MHz RF Operation Channel: 16, Automatic Frequency Hopping Rated Voltage: 1.5V Rated Current: 12-20mA Max. Acceleration: 14ft/Sec Power Supply: 2 x AAA Batteries(Not Included) Mouse Size: 100mm x 65mm x 35mm/3.94" x 2.56" x 1.38" (Approx.) USB Receiver Size: 18mm x 14mm x 5mm/0.71" x 0.55" x 0.20" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x 2.4GHz Wireless Optical Mouse (Batteries Not Included) 1 x USB Receiver