... using pulse width modulation (PWM) switching technology designed to ensure power supply stability and high efficiency. 2. Product interference, through the ... 3. Efficiency above 80%, temperature ≤ 25 °C. 4.LED switching power supply with overvoltage protection, short circuit protection, overload protection.5 ... type of product or repaired bad product. CE RoHS waterproof switch power supply for LED, CCTV