Features Multiple Intelligent Protection: Provides intelligent protection against over voltage, overload, over current, and short circuit, ensuring the safety and longevity of your LED display and industrial automation systems. Aluminum Alloy Shell: Stable and resistant to oxidation, corrosion, and rust, the thickened and reinforced aluminum alloy shell offers long-lasting protection for the power supply, ensuring reliable performance in various environments. Quiet and Energy Saving: Features cellular hole heat dissipation for quiet and energy-efficient operation, while the self-cooling cooling fan type ensures effective heat dissipation without excessive noise. For High-End Places: Designed for high-end environments such as hotel lobbies, KTV, leisure centers, and meeting rooms, making it a practical and stylish choice for locations. PWM Function: Utilizes pulse width modulation (PWM) with half bridge transistor connection and single-phase power supply for efficient and precise power modulation, ensuring stable and reliable performance for LED displays and industrial automation systems. Specification: Item Type: LED Switching Power Supply Type: AC or DC power supply Modulation Method: Pulse width modulation (PWM) type Transistor Connection Mode: Half bridge Input Voltage: AC175-250 (V) Working Frequency: 50/60 (Hz) Output Power: 400 (W) Work Efficiency: 90 (%) Output Ripple Noise: 50-60 Output Voltage Accuracy: ±0.5 (%) Voltage Adjustment Rate: ±1 (%) Load Regulation Rate: 2 (%) Working Temperature: -40~+70 (℃) Power Phase Number: Single phase Installation Method: Screw fixed Cooling Fan Type: Self cooling type Size: Approx. 245 x 63 x 29mm / 9.6 x 2.5 x 1.1in Package List: 1 x LED Switching Power Supply Note: The output parameter is 400W with different voltage, please check carefully before buying. Package List 1 x LED Switching Power Supply