1.Incredibly small nano sized suction cups enable the case to stick to most smooth.Can Stick to glass?? mirrors?? whiteboards?? metal?? kitchen cabinets or tile?? car GPS?? and most smooth?? flat surfaces.</br>2.Works perfectly with all phone functions including gps?? wifi?? apple pay?? 4G?? NFC?? Bluetooth. Great for sticking on your in car GPS Screen. It never leaves a mark!</br>3.If the sticky part got dirty and not able to stick on the wall?? you can wi