Interesting- that is NOT the powerstim we used and designed. It was never in such a box that I ever saw. Prob some sort of knock-off I’d guess- changing the name enough by capitalizing the last part. Powerstim hasn’t been made to my knowledge for years now, though the parent company- several owners later- is doing well with the Slendertone ab unit you see in infomercials. Apparently it was a big seller in France and then came over here.
All these units hand out my literature along with them but I have no connection.