Notes & warranty: This gym phone magnet works with any phone - iPhone or Android. Please attach the metal plate to the bottom of the back of your phone to avoid blocking the wireless charging function of MagSafe or other phones. 4 Adhesive metal plates: This gym phone holder comes with 4 adhesive metal plates for your phone - 2 large rectangular ones and 2 small circular ones. It allows you to use this magnetic phone mount on even non-metal surface, giving more possibility. 360 Phone rotation: This magnet phone mount features a dual-ball head design that makes it super easy to adjust and find your best shooting angle in multiple directions. Making it very convenient for hands-free shooting. Dual Sided Magnetic Base: Holding up to 25lbs, this gym magnetic phone holder uses super-strong N52 neodymium magnets on both sides to firmly hold your phone in place. It is perfect for gyms, kitchens, toolboxes, motorcycles, or anywhere you find metal surfaces. No More Loose Joint: The dual ball arm from our magnetic phone holder has been updated with thumb screws to prevent wobbling, sliding, or tilting. Once tightened, it can hold the heaviest cellphones in position forever!.