2.4 GHz USB Wireless Optical Mouse For PC Black 2.4GHz digital wireless transmission, operation distance is up to 10 meters. Built-in mouse memory, no recoding is needed after battery replacement. 2 Colors for selection: Gray and Black 800 dpi / 1600 dpi, cursor speed adjustable. Package Content: 1 x Wireless Mouse,1 x USB Receiver (battery is not included)