1OVER VOLTAGE, LOAD, CURRENT, SHORT CIRCUIT PROTECTION: Providing multiple intelligent protection, contain over voltage, overload, over current, short circuit protection 2THICKENED AND REINFORCED ALUMINUM ALLOY SHELL: Aluminum alloy shell is sturdy, resistant to oxidation, corrosion and rust, thickened and reinforced 3CELLULAR HOLE HEAT DISSIPATION: Adopt cellular hole heat dissipation, quiet and energy saving. The cooling fan type is self cooling 4MAGNETIC LAMP SWITCHING POWER SUPPLY: Magnetic lamp switching power supply is suitable for high end places such as hotel lobbies, KTV, leisure centers, meeting rooms, etc. 5PULSE WIDTH MODULATION: Modulation method adopts pulse width modulation(PWM), half bridge transistor connection, single phase power supply, very stable 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: 300 (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. 208 x 63 x 29mm / 8.2 x 2.5 x 1.1in 1 x LED Switching Power Supply Have a great time shopping!