Me after the trial surgery. As you can see everything is on the outside. The battery pack is on my chest with wires running to the front and back of my head. Once they know it will work they do the permanent surgery where everything will go inside you. You get a cell phone you use to control it with. You can change the frequency strength up or down as needed. You'll feel a tingling where the nerves are but it doesn't hurt. It's pretty awesome.