Already have a car DVD player in your vehicle? Don't need a car headrest monitor with built in DVD? Save money and purchase our New car Headrest LCD Monitors. They have RCA A/V Inputs for connection to your already existing In-Dash, or other Car DVD Player. Simply plug them in and turn on your DVD player and you now have a custom Mobile Entertainment System. These will even work if you have a Portable DVD player that you currently plug into your vehicles cigarette adapter socket. ( providing the DVD player has RCA Output ) We make adding a car Dual Headrest entertainment system easy and affordable on any budget and you can't put a price on the Sounds of Silence you will have with your children entertained in your vehicle on those long road trips. No More "Are We There Yet"!