I spoke with manufacturer and found more info.
This adapter will support PAL signal. Since most of car DVD Players are PAL / NTSC there is no problem. Only TV option is not going to work. At least for now
I guess you won't have much fun using a PAL monitor (RNS-E) and a PAL DVD player with an NTSC DVD.
I have a similar setup at home with a PAL/NTSC player and an NTSC monitor (the TV). Since PAL or NTSC is the format on the DVD itself, it may play through a DVD player which supports both but if the monitor doesn't support the same format it won't work. You would need to look for an adapter which supports both PAL to RGB and NTSC to RGB to play both PAL and NTSC DVDs on an RGB monitor (the RNS-E).