The magnetic ring is placed inside the smartphone case behind the phone. The force of the magnet allows the phone to adhere to the charging pad.
Altec Lansing 10W QI Wireless Car Mount Charger With Phone Case Magnet - Black
Input: DC 5V/2A,9V/1.67A
Output: DC 5V/1A, 9V/1.1A
Max Power: 10W
Coils: 1 coil
Dash Mount and Vent Mount Application
Device: All wireless and Qi enabled smartphones