The Tetrax Bundle comes with the main holder (vent mount) and dashboard base which enables you to attach the holder to your car vent or the dashboard. It uses a plier like system to secure it to the air vents which means it will fit on vents that have both thicker and thinner flaps. The Bundle uses 4 magnets developed by Tetrax that have been specifically designed in such a way that they will not break or interfere with your electronic devices. A 5th unobtrusive magnet is fixed onto the back of a phones case designed for you phone which enables the mount to work. The Tetrax Bundle also has a stabilizer which helps stop your device from getting knocked about on very rough terrain. It will hold your device securely but does not make it difficult to put your phone onto the mount nor take it off.