3W-500W power adapters, switching power supplies, battery chargers and LED driver. 1. Efficiency：>86% 2. Ripple And Noise：about 35mV 3. Certification：CE GS KC PSE BS SAA C-TICK UL CUL FCC ROHS CB MEPS level VI 4.Protection: over-load, over-current, .Over voltage, short circuit protection 5. Two designs: high quality and cheaper price design. We can make the adapters according to your requirements. 6. Warranty: 12V series 3 years warranty. read full review »