If it is the same as my 08 210WBS, the dvd player is part of a 12v auto/boat/RV AM/FM/CD/DVD player system that is generically available to all 12 volt vehicle types (I had a similar Jensen in my boat years ago). The television is a standard home model - no 12 volt supply in my house. There are 120/12v televisions made, but, most of us would prefer to have a "standard", easy to buy anywhere, household television. Your television uses far more power than your single 12v house battery could supply for any length of time while running the other 12 volt lights and appliance needs. If you boondock for example, you'll need additional batteries, and/or a generator and/or solar in order too run everything...if you aren't boondocking, then you should have shore power and that is 120 volt for the television.
My 2 cents, your mileage may vary...
2 Cats; J-Lo and Ragamuffin :R
2014 Thor Tuscany 40RX DP
2011 Ram 2500 Longhorn CTD HO
2011 Keystone Cougar 318SAB (now gone)
2008 FunFinder X 210WBS (Sadly gone)