You can place it on Glass, Wood, Whitewall, Ceramic Tile, Metal, or even on the wallpaper. Trust on the Green Lion magnetic holder, put your phone, and no worry about accidental falls. Imagine that you are on your bed and want to see a movie on your phone, you want to put your phone somewhere to have the best screen visibility, if you have this product, it will do the all for you, the hardest part of the decision is to chose that where you want to install it.