Switching Power Supply 5V, Convert AC 110V/220V to DC5V 30A Max,150 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 meterial are plastic and aluminum, which are good heat dissipation. The aluminum is carved directly, which make the transformer easier to heat dissipation. Quality Guaranteed: Free 2-year unlimited warranty , if you have any question about our LED transformer, please email to us. We will respond within 24 business hours