The Innovatek FM-838 wireless headphone have a built-in FM RADIO.
This is the perfect and easiest solution for kids to listen
and watch TV in the CAR.

HOW TO: You need to Connect a FM TRANSMITTER to a output earphone plug of any audio devices (Like a Portable DVD player are a MP3/CD Player). And you will be able to listen the selected broadcast FM frequency with this headphone.
If you have 4 kids, just buy 4 set! simple, easy and cost effective!