... .Stable quality,competitive price 3.Cetification: CE,CCC,UL led driver power Switching power ... -p250mVp-pVoltage adjust rate4.7-5.3V8.7-9.3V11.6- ... adjustment±5%±5%±5%±5%±5%±5%±5%Load adjustment±1%±1%±1%±0.5%±0.5%±0.5%±0.5%Rise ... (Under 300V surge, lasts for 5 seconds. Without damage)Frequency47~63HzEfficiency80% ... , power supply, charger, battery charger, Led charger ,mobile charger, please don't hesitatet ...