19 inch laptop cooler max fans 3 fan dimensions 80 x 80 mm fan height 10 features fan control cable management special feature adjustable fans max fan revolution 1 800 rpm min fan speed 950 max noise emission 23 db min noise emission 21 weight 11 kg materials aluminium plastic rubber connections 1 x usb 20 colour black series coolermaster notepal power supply usb nominal voltage 5 v nominal current 046 a operating power input 23 wa