MERRYKING as a famous manufacturer of switching power supply and transformer has exported power supply products over 15years since we established, We are focusing on power supply designing and manufacturing in Shenzhen China. We established scientific, intact and efficient quality management system, which extends from product designing, raw material control, on-spot production management to after-sale services with constant, stable and reliable quality assurance. ISO9001:2008 system is fully implemented in our all managements. Our products have passed most of safety approvals in the world including UL, cUL, FCC, PSE, GS, CE, SAA, CCC, C-tick, CB, etc.