Designed with an adjustable ball and socket system at both ends that allow you a wide range of movement for the perfect viewing position - height adjustable for an adult or child passenger. Easy locking knobs at each joint ensure a strong and stable grip so your tablet won't drift, sway, or sag while your car is in motion. Mount-It! Car Back Seat Headrest Tablet Mount Fits 7 to 11 Inch Screen Sizes, 3.3 Lbs Rated, Lockable Joints, Full Motion The Mount-It! Car Headrest Tablet Mount is designed to be an adjustable, rear-facing tablet holder that allows your car passengers to view or use any 7" to 11" tablets conveniently from the backseat of the car. No special tools necessary - the headrest mount can be easily attached and removed from a car's front seat headrest post. The heavy-duty, durable aluminum arm securely holds your iPad or tablet in place while your vehicle is in motion. Compatibility: fits tablets from 7 inches to 11 inches Weight Capacity: 3.3lbs Material: ABS Aluminum Adjustable Arm Height Tilt your tablet or iPad for a better viewing experience and take advantage of the 13.5 inches of height adjustment to perfectly position your device, making it great for both adults and children. 360 Degrees Rotational View Choose between landscape or portrait mode with the 360 degree rotational capability. Heavy Duty Aluminum The ABS Aluminum arm is durable and holds sturdy even on the bumpiest of roads. It is built to withstand heavy-use and designed to keep your tablet or iPad from vibrating while in motion. The load capacity is 3.3 lbs which covers most tablets and audio video players.