Vintage electronic muscle exerciser

Appears to be unused. The straps and pads that go in your skin are all still wrapped and in their original packaging. I unwrapped one just enough to plug it in and tried it in one plug outlet and felt a small tingle….but I’m a chicken so selling as-is, cause I’m not opening the whole things up to see how high it’ll go. Lol. Comes with the plug and also a very clean area that clearly holds a battery if you choose that method.