... 50-60Hz 2.2 years warranty 3.UL,CB,GS,CE,FCC,ROHS,SAA,PSE,EK,KC approved 4.over voltage ... protection 1.Universal input voltage 2.UL/CUL, PSE, GS,CE, SAA, FCC,EK 3.10Years Experience Factory 4.High efficient ... resistance: DC 500V 100MΩ (minimum) 5V 6V 7V 8V 9V Open Frame Switching Power Supply