Compatible with all Smartphones & Tablets. Adjustable Size to fit all smartphone and tablet from 7 up to 12 with full accsess to all buttons and ports (ipad pro, ipad air, ipad mini, iphone 7 plus, iphone 6s 6, samsung galaxy s7 S6 edge lg g5 g4);No special tools for installation, Easily attaches to headrest posts, Mount the headrest in seconds and transforms your tablet into a perfect in-car entertainment system;Telescopic arm can extand an extra 8 inches to allow customize Multi Passenger viewing;Easily attach & secure headrest mount on car seat without tools;ChargerCity Direct Replacement Warranty