The television tuner card is a device that, when installed or connected to a computer, allows live television to be played through it. It is a type of video capture card. Often, it can be used with other video devices, such as DVD players or PVR systems, but specializes in working with television signals. This is mainly because the card has an internal tuner that allows someone to change the TV channels while they are being viewed. The card is available in both internal and external models and can be installed on a desktop computer and some external cards can simply work with a computer monitor.