Look no further, this is THE medium need. I have one in every car. The product is very easy to implement. It consists of two distinct parts, the magnet to grip (part in the car) and the self-adhesive support. The magnet clamp a car ventilation grille or there was a small sticker holder that can be attached wherever you want and then to clamp the system. the plastic holder (in Wave shape in the photo) retires to have a fairly discreet product. There are several stickers of different sizes media to stick to the back of your smartphone or tablet, or GPS (personally I glue it on the phone shell Iphone Iphone 5 & 6). Your phone (or other) will hold great (hump backs Dane, brake ...) Tetrax is TOP.