This is a 600 watt switching power supply by Totiwo Technologies. The innput is user selectable between 115 VAC and 240 VAC. The output is 12 VDC at 50 Amps. It measures 10" long by 5" wide by 3" high. It comes with an AC cord. Often used to power 12 volt radio transceivers. Worked when removed from service.