... 3.OEM/ODM are optional 4.CB, ROHS, GS,UL approved Rated volage: 100V-127V, 220V-240V Rated frequency: 50HZ-60HZ ... products have obtained many certification. Such as CCC, CB, GS, CE/EMC/LVD, PAHS,ROHS, UL, EK, CUL, PSE/JET, KETI ... company have passed the approval of ISO9001-2008 International quality system.