LB1 High Performance New Super Cooling Fan for Laptop Notebook Computer Cooling System Cooling Fan Cooling Pads with Single Large 160mm Fan Single Large 160mm (6.3") fan provides extreme air flow. High thermal heat dissipation prevents overheating . Great ergonomic shape for simple typing. Support low noise. Slim and Smart design. Helps notebook to operate at full speed even while running high performance applications. Lightweight and compact - Perfect for portable user. Powered by 1 USB cable. Plug-and-play: no drivers or software needed. Rated Voltage: DC 5V. Speed: 500 RPM. USB Port: 2. Dimensions: 13 x 11 x 1.5 inches.