1,Constant Voltage 2,Output: 200W,12V 3,IP67,IP68 4,Certification ... width modulation (PWM) switching technology designed to ensure power supply stability and high efficiency. 2. Product interference ... 80%, temperature ≤ 25 °C. 4.LED switching power supply with overvoltage protection, short circuit protection, overload protection ... bad product. CE RoHS waterproof switch power supply for LED, CCTV