Cotek " pure sine wave power inverter". Model # S-300-24. 300 watt continuous power, 400 watt surge power. Pure sine wave for high end electronics , or use for lighting etc. GFCI Receptacle. Inverts power from 24 volt to 120 volt, solar ,wind , battery. Brand new never used ,perfect for RV, boat, or cabin. Also could be powered with 12 volt system using a step up transformer ( 12 volt to 24 volt).