[360-degree rotation and four-degree rotation axis]: (360) rotating rotatable ball connection can be easily stretched to a maximum of 10.6 inches. With four rotation axes, you can easily get a perfect angle of view. [Your preferred adjustability]: Choose whether your tablet is placed directly behind the car seat of one passenger or between the driver and front passenger seats of several passengers. Let you watch videos more conveniently and make life easier. [Installation is quick and easy]: No tools are needed, just install the headrest bracket on the car seat. Just connect it to the headrest rod and install the headrest within a few seconds to turn your tablet into a perfect car entertainment system. [Safety and stability protection]: High-quality ABS design, soft foam pad, protect your equipment from vibration and scratches, and increase the friction between the two, better grip, and can stand loosely and fall fall. [Excellent compatibility]: This headrest bracket is fully compatible with all devices from 4.7 to 13 inches, such as the new iPad 2019 Pro 9.7, 10.5, Air Mini 2 3 4, desktop accessories, tags, e-readers, smart Mobile phones and tablets. Compatibility:The distance between the two metal posts on the headrest should be 4.3" to 6.9".Compatible with smartphones/tablets/switches 6.3 inches-9.3 inches. This is the screen size, not the width. Material: Aluminum + ABS plastic