I broke it right away when I opened it so I'm not quite sure about this thing. Looks cool but I pulled it apart trying to expand it and the two pieces went apart. Luckily I got this item at a discount in exchange for my review, so nothing was really lost.

This thing is a big waste of money. The very first time I used it, one of the pads, right out of the box, didn't adhere. I had to hold it in place. Secondly, you can barely feel anything. I called the company to see if they would send me another pad and they said I had to return the entire thing first. I was on the phone with them for 15 minutes before they gave me an answer. Asked all kinds of questions which I had already answered and decided it was not a good purchase.