... .Quality certification CCC,UL,GS,KC,PSE,CE 2.Provide constant voltage power supply for Digital set top box.3.Used ... requirements.5.Overall quality reliability test such as loading output,no-loading output,full load efficiency,noise data,short circuit protection, ... vibration test etc.6.Power Switching Efficiency: >83%.7.Load/no-load output tolerance:3% European market type power adapter CE GS approved ...