1. Ergonomically-designed 2.4 GHz wireless mouse, ideal for home or office use 2. Optical tracking technology, works on many different surfaces 3. 16 wireless working channels, automatic frequency jumping 4. Frequency: 2402MHz-2480MHz 5. Wi-Fi Range: 5-8m app. 6. Rated Operational Current: 8-15mA 1.5V/3V 7. Color: Black 8. Mouse Size: 100x 65 x 35mm app. 9. USB Receiver Size: 18 x 14 x 5mm app. 10. Mouse Weight: 64g app. 11. Powered by two AAA batteries (not included) 12. Compatible with most laptop and desktop computers via USB receiver (packed in the mouse), such as Windows 2000/XP/Vista/Linux/Win 7/MAC operation system Package Contents: 1 x Wireless Mouse, 1 x USB Receiver Cautions: 1. Operation distance is closely related to the environment. 2. The mouse will shut off automatically and enter sleeping mode for saving power when its not used for a long time. To wake it up, press the right or left button.