You could probably find an HDMI to AV adapter out there that would work with the Jensen RV Stereo w DVD Player # JWM60A but most of the ones I've seen do require that AC power.
If you haven't purchased this stereo yet then I recommend picking up a different one like the Jensen # JWM45 or iRV # IRV64FR that already has the HDMI port so you aren't digging yourself a hole prior to your purchase. These are a little smaller than the one you were looking at but they carry the same basic features... view full answer...