Seems to be a rare item. AC Power supply- for a train car or engine room accessory outlets? Can take either 10 or 12 VDc and puts out 115 VAC (standard US housecurrent) Dual input voltage 10 or 12: for 10 v in use terminal 3/4 out for 12v in use terminal 3/5 150 VAC = approx 1.3 amp output or 150 watts. We connected a 12 volt battery to the input terminals and connected a standard 120v 90w light bulb to the output, and it lit up fine, as seen in pictures. (NOTE: BATTERY AND LIGHT BULB/ALLIGATOR CLIPS ARE NOT INCLUDED IN THIS SALE) Good old heavy duty type inverter (not then new china type that burns up!) could be used for home use, solar projects etc, Buyer to have proper knowledge or research what items can be run off this. All sales final. 16.3 lb unpkd wt approx size in inches 10.5 x 8x 5 tall