The OnGlass OG 3.0 MagTab Phone Adapter is a low-profile magnetic plate that sticks to your phone case (or MagSafe Backer) with 3M adhesive, giving you a strong magnetic connection to the On Glass adapter. Every On Glass kit already includes a MagTab - you only need this if you want a spare. FeaturesRun the OG system across multiple phones (yours, a hunting partner's, a backup)Replace a MagTab that's been retired from an old caseMove to a new phone or case without swapping the original off