OPTIMAL MOUNTING SOLUTION: The mount fits most 2-post headrest configurations and can be mounted to either the driver's or passenger's side seat. And also effortless installation and easily secure to headrest without use of tools. ADJUSTABLE GRIP WITH 360? ROTATION FREEDOM: simply adjust and secure your tablet or smartphone to any angle and position that suits your preference and enjoy the comfort of your ride. PERFECT IN CAR COMPANION: Works well with all Smartphones, iPad & Samsung Tablets as well as other 4 inch - 11 inch Tablet PCs?The distance between two metal posts on your headrest should be 4.1in-5.9in SAFE & SECURE: Designed to keep tablets steady during car rides. The mount attaches firmly to the headrest posts of your vehicle and is the safest location for mounting rear seat entertainment devices. PORTABLE & TRAVEL FRIENDLY: Folds up compactly for easy stowing in your vehicle when not in use - Car mount carries easily in a travel bag or purse for use in rental vehicles or a friend / relative's car. Flying soon? Headrest Mount can be fitted to seat back tray table turning your Tablet PC into an inflight personal video system.