GV-3D1 hdtv?

It means it can be hooked up to an HDTV... pretty self explanatory...

Unless I'm misunderstanding your question/confusion..?
 
i have a 22 lcd isnt it already hd? whats the hdtv adapter for?

HDTV. It is for high-def TV ("hd" isn't a spec of any kind, so your 22in LCD can't be "hd" because "hd" doesn't really mean anything outside of the TV context)
 
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