Feature: 1. MULTIPLE INTELLIGENT PROTECTION: LED driver provide multiple intelligent protection, contain over voltage, overload, over current, short circuit protection 2. ALUMINUM ALLOY SHELL: Aluminum alloy shell is durable, resistant to oxidation, corrosion and rust, thickened and reinforced 3. QUIET AND ENERGY SAVING: Cellular hole heat dissipation, quiet and energy saving. The cooling fan type is self cooling, with good effect 4. FOR HIGH END PLACES: Magnetic lamp switching power supply is suitable for high end places such as hotel lobbies, KTV, leisure centers, meeting rooms, etc., very practical 5. PWM FUNCTION: Modulation method adopts pulse width modulation(PWM), half bridge transistor connection, single phase power supply 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 Working Frequency: 50/60 (Hz) Output Power: 400 (W) Work Efficiency: 90 (%) Output Ripple Noise: 50-60 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.