Note: Please Note: The required headrest pole's width is from 10 cm to 15 cm, it means the width between two metal posts of your car headrest required 10-15 cm, please make sure the width before you order. Make your job easily aa With this kind mount, you can free hands to video conference,view files, watch video,take notes at the backseat of car, makes your job more easier. Best compaion of the car trip av With this perfect tool for car trip, the back seat becomes a home theater in seconds, the long-distance travel will not be boring, your kids or other backseat passengers can entertain by themselves, they can watch movies, cartoons while long distances car trip and you can drive more attentively. Materials: ABS Plastic Anti-skip & Anti-scratch Silicone Premium Aluminium Alloy Features: 360°Rotatable, Prividing You A Comfortable Viewing Position, the viewing angle is up to you. Easy to Install. Install without tool High Quality. Made of sturdy aluminum alloy and durable ABS materials, it is sturdy and durable Tightly locked, firm and not falling off, With a three-stage design, each part is closely connected to provide stronger stability for the equipment, not afraid of bumps. Tightly locked, firm and not falling off Charging Available.Reserve holes for charging during the journey. Easy to Install. Step 1 Loosen the body screw nut, put the ball rod into the screw nut, then connect the base to the board and hear a click to indicate that it is locked, tighten the nut. Step 2 Choose viewing distance and angle, then tighten the the adjustment screw Step 3 Fasten the retractable end of the base buckle on one side of the headrest rod, push it inward, and fasten the other side, and the installation is completed. Features Reserve holes for charging There are holes at both ends of the bracket, it is convenient for charging on the journey and does not block the data cable Retractable Length The sturdy and flexible arm design, makes it easy to adjust viewing distance from 5 cm to 22 cm, providing you more near-point view during you watching movies, cartoons. Protect Devices The two protective and anti-slip pad utilized soft EVA cushion and soft rubber pads can protect your devices from vibration and scratches.