Audiovox FLO TV AVXMMF1 Owner's Manual page 23

Once you have set your PIN, you can now change the ratings
limit on TV, Movies and Audio content. To change the
ratings:
Use the (down arrow) key to highlight TV Rating, Movie
Rating or Audio Limit or Restricted Channels and press the OK
key on the remote control. The following screen will appear:
Use the (right arrow) and (left arrow) key to change the
TV rating. Once you get to the rating you want, press the OK
key to select it. Press the (Back) key to return to TV
viewing.
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