The Jensen name is put on junk for China as is the Polaroid and Skyworth names. Same is true for RCA branded electronics. The LCD TV's are junk and so are the combo units and the separate DVD players. Read any of the owners reviews on Amazon and elsewhere. Our Polaroid TV lasted about 14 months. Our Skyworth lasted about 1 week, was repaired by the factory and then lasted less than a week.
Best to get a top tier brand combo unit like the one that Toshiba sells and use an inverter to power it off 12v when you are not hooked up to shore power. The LCD TV's in the 20-24 inch size range draw less than older laptops so you do not need much in the way of an inverter for them.
Good brands are Toshiba, Panasonic, Sony, Samsung which are tier 1 manufacturers.