1,Low price and high reliability 2,High efficiency 3,High power factor 4,CE,ROHS Specification:1 ... , Input voltage: 100-240Vac2, Input current: 0.12A Max.3, Power ... Output voltage: 18-21V6, Output current: 300mA7, Output power: 6W8, Efficiency:79%9, Ripple voltage: 1V10, Operating ... 21MM 6W LED constant current driving power supply(indoor use)