Works on 120VAC or 220VAC, 50-60hz. As mentioned the auxiliary 13.6VDC jack that can supply 13.6VDC at 1 amp is not working, the fuse is good but no voltage there and this happens to many PS-7's. I have had many PS-7's and I have never needed to use that jack anyway so not important to me as it's only 1 amp. Just tested and used and working well except aux.This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Transceivers". The seller is "hamguy123" and is located in this country: US. This item can be shipped to United States.