Power on board max sst vehicle power system. 500 watt power converter

Power on board max sst vehicle power converter. Converts 12v dc power into 120 volt ac power. 500 watt. Powers up to 4.2 amps. Works! Case included but it’s in rough shape with one latch broken off. Still keeps it clean and dust free tho. 5 1/2” to 9” including tie down on front and input stems on back. 3 1/4” tall including handle on top but handle not extended.