... USB cooling laptop pad 1.Material:metal 2.3 fans,with key switch 3.low noise,long life,good cooling efficient. Metal USB ... cooling laptop pad 1.3 fans all-metal USB laptop cooling pad,excellent workmanship. fan size:6 ... to use. 4.With key switch,convenient to control. 5.Pad with enough hole design, excellent heat elimination efficient. 6.With ...