I bought this item. They were easy to install but a little disappointing. There is nothing special about these headrests. They are cheap for a reason. They have the option of changing from video 1 or 2 but only have one video input. They have volume controls on them and the remote but only have audio in with no speakers attached to the headrest. So unless you're just replacing some bad monitors in your vehicle or already have the rest of the equipment, buy something else. You will need a DVD player that's capable of powering speakers and speakers to set up a system in your vehicle. At the cost of buying all the equipment you could get a set that have the DVD player with speakers for cheaper.