Made of premium aluminum alloy, four powerful neodymium magnets, luminous silicone ring and 3M soft liquid silicone gel. Easy installation just stick the holder to the dashboard or any other flat surface, and with a metal plate on your phone or case or built-in plate case, then put your phone to the mount, and when you want to take your phone off, just slide it from one side to the other. Powerful magnets ensures your smartphone stay securely on the mount and won't bring any effect to your phone or GPS signal. Magnet is strong enough to hold up to 10 oz.