Magnetic Car Air Vent Mount Holder Rubber Non-Slip Metal Plates Adhesive on or Inside Phone Case Holder Quick-snap technology allows your device to snap onto the holder instantly. Made with magent which firmly and safely mounts cell phones, GPS units, satellite radios, MP3 players, mini tablets and other high-tech devices 2 metal plates: one round plate for non-removable battery doors (stick onto back of phone), thin plate for removable battery doors (place in between battery and battery door). Magnetic one step mounting technology. Powerful Magnetic Mount. Small Ergonomic Design. Rubberized car vent base securely attaches to car vent. The enhanced magnetic holder functions well and makes your phone adsorb onto it steadily regardless of road vibrations or impacts; Device can be positioned to any desired angle. Quality rubber construction of this hold prevents your air mount from out harm; it will solidly hold the air vent and not move no matter how you swivel or rotate; Cradle-less, full accessibility to screen. *** Easy to use! Stick the round thin metal sheet on the back of your phone,then your can use the holder. Or you can install the square thin metal sheet between your phone and your phone case,then you can hold your phone.