AC/DC Adapter Suitable for telecommunication, domestic appliances. 56 years experienceInput voltage: UL, PSE, CSA (100 120V/50/60Hz),CE, VDE, SAA, BS, GS (220 240V/50Hz)Applied standard: nationalGB4943-2001;EC EN61558-2-6; TUV-GS/CE US UL1310; UL950Canadian CSA22.2-223Overheat protective, easy installation,stable performance and reasonable price.UL Certification No.: E310452