1. Input:90-264VAC 2. CE,FCC,ROHS,PSE,UL approved 3. packaging:PE bag 4. OVP,OCP ... that we made completely meet safety requirement(UL,CUL,PSE,GS,CE,FCC,CE,EK,SAA,BS Approved). 2.You ... get sample from other suppliers that is in comparison with our products .You must find that the quality ... 20%~90% RHStorage temp humidity............ 20%~95%RH wall mount 3V 1A AC DC Switching Power Supply with CE UL PSE