<1547 is stamped on the transformer. ?. < <I'd like to make this run off 110 without having to modify the actual uni <itself. Assuming the power drain isn't in the kilowatt range JDR sells 110/220 transformers in the under $100 range. They sell them for to run 110 stuff on 220 but they can be sued the other way. Do use a plug on that 220 unit that is unique so it doesn't get plugged into something other than what you want. Allison