U3 provide 3 removable fans with speed control function which can be adjusted and focused on the 3 hottest spots of your notebook cpu gpu and hd clip design fan speed controller let you easily replace the controller to the handiest position specifications colour black materials aluminium rubber dimensions whd 420 x 320 x 65mm fans dimensions 80 x 80 x 10mm x3 weight kg 104 operation degree 10 degree fix power 5v dc usb usb 2011 x1 for power in fan spe