LED drive power 1, 100% Full Load Burn-in Test 2, TUV CE UL CB Rohs 3, +2years warranty 4, 27 ... pulse width modulation (PWM) technology, to ensure that the power supply of high stability and high efficiency 2. CLASSII segregation 3 ... through UL1310, CAN/CSA - C22.2 NO. 223 - M91; Reference TUV EN60950-1,EN61347-2-13 design 9.Emc standard: EN55022classB ... ,3,4,5,6,8,11; 15x1W LED drive power supply CE