When it comes to the size of a headrest monitor, you're only limited by the size of your vehicle's headrests. However, because of the visibility needs that arise from the fact that these systems are in a car, most headrest monitor viewing screens top out at around 10 inches (25.4 centimeters). If you want a larger screen, you're likely going to have to consider a ceiling-mounted video monitor.
One of the reasons that many people want headrest video monitors is so their passengers can choose their own entertainment. However, just because a car has headrest monitors does not mean that each monitor is capable of playing unique programming. For instance, if you have two kids and one wants to watch the Jonas Brothers while the other wants to watch Spongebob, your system will need to meet some specific requirements.
First, you're going to need more than one DVD player. It's very important to distinguish between scenarios where you'll require more than one player and simply a DVD changer. A DVD changer is a DVD player that holds multiple DVDs in reserve, but can only play one at a time. To play two different DVDs, you'll need either two players (perhaps mounted in the headrest behind each screen) or a DVD player that's capable of playing both DVDs at the same time. Make sure you know what kind of setup you're opting for.
You'll also want to investigate the audio options for your in-car media. One of the benefits of in-car DVD and video is that it can effectively end your kids complaining about how old your choice of music is. Unless you want to listen to everything your passengers watch (which can be very distracting), you'll need to check out your audio options. Some in-car DVD players play the audio through the car's stereo system, subjecting everyone to the same sounds. Others allow passengers to plug headphones into jacks near their seats to select the audio they choose. In this scenario, the audio the driver selects is played over the car's stereo. Still others have wireless headphones that allow passengers to choose their audio. When buying a factory or aftermarket headrest monitor system, be sure you know what your audio options are.
Keep reading to learn more about in-car entertainment system setup.