You should test whatever product you buy to make sure it displays captioning. By law, any device that has a tuner (enabling you to change channels) must be able to display captions, However, if you buy a monitor designed to attach to a tuner (such as a cable box or DVD player) then make sure that (a) your cable box/DVD player, etc. can transmit captions and (b) that the monitor is able to display it. Most should. Some may not.