You must use this television with cable or satellite tv. It is not to be used as a portable tv. It can be used as a portable dvd player or to watch movies with a USB stick with the built in battery or with the adapter that plugs into the wall.
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This unit comes with everything. It has TV (that can be used with cable or satellite tv), a DVD Player, a disk that allows you to choose from 300 Games, and it is a Portable Media Player. It's Portable Media Player function allows you to insert small external hard drives into it's USB Port. Onto these Mini Hard Drives, you can download music, pictures or a movie from your computer, and then plug it in and play. With all of this functionality, this is truly the most versatile piece of media available!