There are two screens for each built-in DVD player (also a USB port and ability to read an SD / MMC card).
The actual size of the screen is 11 cm x 19.5 cm. The image resolution quality is very nice.
I did the test with a DVD, the drive is a little noisy but by car it's a bit annoying cons in use at home if you set the sound quite low, it means purr.
Both screens come with many things:
AC adapters,
a cigarette lighter adapter which is enough to supply both screen readers,
remote controls for each device (unfortunately my remotes arrived without batteries, you need CR 2025 and attention to the direction of insertion, I put an upside it was very difficult to recover the battery)
helmets with in-ear tips (good in my opinion, it's a little gadget and it takes up the volume to hear drive where a risk to the ears of the listeners, for my part, I use headphones reducers an inexpensive sound but wins over the term)
mounting hardware for each headrest,
Finally, an AV cable that connects the two screen readers if viewers want to see the same program.
I have a Philips mobile reader to see a DVD drive, Muse surpasses in sharpness and it's so nice to have two screens that can be independent! Deeply long journeys by car because our girls will forget to argue and ask the usual question: "when are we there yet?"
I highly recommend (sorry I can not offer an opinion over time but will do in a few weeks), lack of batteries is a bit annoying but Amazon customers defended well and I'm sure it would have been missing compensated.