1.excellent work performance: large power switch power supply with 5~10s delay detect circuit design can avoid instantaneous output and instability high voltage; Short circuit overload over voltage protection; Convenient to install. 5~10 seconds delay detection circuit desig good to eliminate the power electricity output high voltage instability to prevent the load from the impact of the high voltage(especially LED power supply to minimize work voltage mutation caused by the light failure). Working efficiency: 82%. Easy to install. 2-year quality ensurance.