Supraorbital nerve stimulator. Mine is implanted in the right side of my forehead just above the eyebrow line just above the eye socket right dab smack in the middle of my face. I was able to be asleep for this implant because I was told that there was only one site that the stimulator could be implanted ( as opposed to being awake for the oppicipitol nerve stim trial). WhEN YOU HAVE THE TRIal , the lead come out the side of your face and are attached to the battery pack you carry around for a week or so. If you go ahead with the implant the wires are then routed around the top of your ear, around the back, down your neck and the battery is implanted in your chest. You then have a controller, chaaarger etc all enclosed in this Medtronics case. I have the rechargable battery which I am told is good for about 9 years. I recharge it abouot once a week even though they say you can go longer. I just don't want to take a chance of it charging down ( losing charge?). I'm told it can be restarted up to 3 times if you do let it lose charge. I've had mine almost 4 years so I am assuming improvements have been made. I know that on the newer models, one is able to change the rate of stimulation. I can't do that on mine. The problem with there only being one site for implantation is this. For me, the tenderness I experience is right in the corner of my eye ( amoung other areas in my head.) The stimulator does not cover this area. Also, if one turns the stim up too high, it really hurts. The stem was meant to help with pain in the forehead and the trigeminal nerve. Suprisingly, it seems to ease some of the pain in the lower, back portion of my head. Doc can't seem to explain this. Please be forewarned. This is experimental and I have yet to find any other doctor who will see me with this stimulator , even for a second opionion so make sure you are very happy with the doctor who will do the procedure and follow-up. I had to be hospitalized once for pain and a neurologist who was on-call was insisting that it be removed as it was nonsense!!! I don't know how wide spread these are being done but would be willing to tell you where I had mine done. Just be very sure you would know what you are getting into. I'm not sure I would do it if I had it to do over again.