Secure Mounting on The Roughest Terrain with Vent Mag-XL. Equipped to grip onto any AC vent, Vent Mag-XL ensures that it doesn't fall off even during the toughest road trips. Vent Mag-XL is engineered to support the iPhone and any other smartphone device by using the provided metallic plates. Equipped to grip onto any AC vent, VentMag-XL ensures that it doesn't fall off even during the toughest road trips. Secure Vent Grip Optimal Viewing Angle Universal Compatibility Vent Mag-XL is engineered to support the iPhone and any other smartphone device by using the provided metallic plates.