The Eonon C1100A is a large 10.1" complete car video entertainment system and it includes all the necessary parts to fit your vehicle. Installation is very simple. Just power and ground wires, fix bracket and twist screws. NOTE: Our standard is a 160mm Bracket! if your car needs a smaller Bracket, You need to buy a 90mm A0444 or A0446 Brackets! WE HAVE NARROWER MOUNTING A0444 or A0446,IF YOU FOUND YOUR HEADREST MOUNTING IS WIDE TO INSTALL,PLEASE CONTACT US. .