laptop cooler *Eco-Friendly Material (ABS Manufactured by LG Chemical) *Practical Size for Laptop Users on the Office and Home Desk *Ergonomic Design to Prevent Users from Suffering VDT Syndrome *Big Silent Cooling Fan (8cm) *Anti-slip Pads *5 Steps for Height Control (16° /18° / 21° / 24° / 27° ) *No Additional Power Needed (USB Powered) *Prevent Laptop Overheated and Improve Overall Performance Rotational Frequency: 1800 rpm Noise Level: 18dBA Maximum Air Flow: 22 CFM Operating Current: 0.15A Size : 240 x 300 x 87.5 mm Cable Length: 45CM Package: 6pcs/carton