Summary: Nowhere in the advertisement does it tell you that a 12 volt battery is needed to work the IR module, you cannot plug it into a plug. The idea that each headset needs batteries are fine and expected.
Summary: I bought these for a portable dvd player for my truck and they work like a charm only issue that might be a problem is the headsets are a little big for my 4 and 6 yr old but otherwise work great
Summary: Nothing in discription stated that a 12V DC supply would be needed. It should have been included. The headphones were retailed by Walmart, but they were sold by Tiger Direct. Also forgotten was the price to have it mailed from Tiger Direct and no ability to pick it up i a local Walmart.