... .DC 5V2A constant voltage supply, PC+ABS material.3.Quality certification CCC,UL,cUL,BS,GS,KC,PSE,SAA,CE ... constant current power supply for digital electronics products.5.Used quality safted components and standard components, such as rectifier,MOSFET, ... and mechanism based on customer detail specification requirements.9.Overall quality reliability test such as loading output,no-loading output, ...