Cute design: lovely hamster shape, super cute and stylish. Made of material, durable and smooth. Especially for children with small hands. It's very cool and easy to carry, a perfect gift for kids or friends. Easy to use: powered by 1 x AA battery (not included). Wireless mouse connects to your computer via USB receiver (stored in the bottom of the mouse). 2.4 GHz wireless technology: Can provide a powerful, reliable connection, the range is up to 10 meters. To save power, please turn off the mouse switch. Usage: Plug the receiver into a computer USB port, make sure the receiver with the USB interface is in good condition, then wait 5 seconds to work normally. Good performance: works well with Windows 98 / ME / NT / 2000 / XP / Vista / Win 7 / Linux or Mac OS. Note: 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.