JINHEZO Nano 2.4G Wireless Optical Mouse Switch Black Powered by 2xAAA battery (not included) ,ON/OFF switch Automatically power saving. Plug in nano receiver and go wireless2.4GHz reliability and performance;Works on most surfaces except glassWorking range within 10 meters. Smooth,rubberized grip ergonomic design 2.4GHz Wireless USB Wheel Optical Mouse. Perfect for home,office or out on the roadIdeal for PC and Laptop use. Bulk packing with good quality warranty.