Easy to assemble: For assembly, the holder can be attached with one hand without tools and can be removed in 2 seconds. Compatibility with the headrests: The tablet holder is only suitable for car headrests with two metal supports that can have a distance of 12.5cm to 15cm. (Before buying, make sure that the holder is compatible with your car. ). Compatibility with the devices: It is suitable for iPad / Samsung Tabs / Nintendo Switch etc. between 4.4 inches and 11 inches. Adjustability Thanks to the newly innovated design, the bracket can be pulled out in a horizontal direction. Multi-angle rotation with ball joint to set a perfect viewing angle. Compatibility:The clamp is suitable for different sizes of devices from 4 to 11 inches, e.g. iPad Air, iPad Mini 4, iPad 4/3/2/1, iPad Pro 10.5/9.7, iPhone X / 8 plus/ 7 plus, Fire HD 10/8/7, Huawei Mediapad M3/T3, Google Nexus 7/10, Samsung Galaxy S10 / S9 / S8 plus / note 8/A5/ Galaxy Tab A / Tab S3, Nintendo Switch, Kindle etc. Can not only clamp tablet but also perfect for mobile phone. With this innovative holder you can slide your screen forward so that your switch stays a comfortable distance during games. Made of premium aluminum alloy and durable spring The soft rubber disc protects against slipping, keeps your tablet securely in place for anti-vibration and anti-friction. The holder is padded with rubber, and will not scratch your device. When you clip a phone, the holes are ready for charging cable. The arm is tightened by the screw.