Ultrathin mouse,is different from the traditional mouse operation,touch type wheel key,ergonomically-designed 2.4 GHz wireless mouse,ideal for home or office use. Compatible with most laptop and desktop computers via USB receiver. 16 wireless working channels, automatic frequency jumping. Frequency: 2402MHz-2480MHz. Wireless Range: 10m. Powered by two AAA batteries (not included). SIZE:83*53*19MM?. The mouse will shut off automatically and enter sleeping mode for saving power when it's not used for a long time. To wake it up, press the right or left button. ?