Genuine Delta Electronics ADP-50HH Rev. B 50W 19.0V 2.64A 3-prong AC Power Adapter.Delta Model Number: ADP-50HH Rev. BSpecifications:Watts: 50WInput: 100-240V ~ 1.5A 50-60HzOutput: 19.0V - 2.64AConnector: 5.0mm (outside) / 2.5mm (center) right angle