1)over voltage oritectuib:120%2over current oritectuib:120%3)over protection4)Short-circuit protection:automatic recoveryEnvironmental requirement1operating temperature:0-402)storagetemperature:-20-853)operating relative humidity :595%RH4)Withstanding voltage :AC 3,000V(min),5mA(Max)5)Insulation resistance:DC 500VAdvantages1 AC Input power suitable for the world2 Sofe-start cuttent can reduce the AC input impact effience3 With short-circuit and overload protection4 Compact size,light weight5 100%full-load burning test6 Installed with EMI filter,minimum wave. Good comparison between quality and price . charger 3W 15W . CE,ROHS. USA .EU .British .Austualian.Middle East .Africa plug styles are available with different pattern.and we produce each kind of chargercharacter to saaure it works well. Light color and the color changes can be designed according to customers request..