About this item Switching Power Supply 5V, Convert AC 110V/220V to DC5V 5A Max, 25 Watt Max. IN-DOOR USE ONLY! Smart device surge protection for Short-circuit Protection, Overload, Over Voltage, Over Temperature Protection. High efficiency, High Reliability, Low Temperature Rise. Built-in EMI filter, low output ripple, noise, Rugged heavy-duty enclosure, 100% Full load burn-in Tested. Parallel/Redundancy Operation is possible. Good performance: mainly materials are plastic and aluminum, which provide excellent heat dissipation. The aluminum is carved directly, facilitating better heat dissipation. Size: 4.33 x 3.15 x 1.42 inches.