I remeber when I was a kid and my moms friend had a muscle stimulator that plugged stright into the 120 outlet and you just turn afew dials it was cool I made it shock me to where it made me look like I was firing a 50 cal aa gun and I just pretended to vw shooting down tanks and got ripped like as a kid using that thing every other day for like 4 months it was crazy hiw effective it is