A digital adapter is a video device that enables an analog TV to receive channels that have been transmitted in digital format. If you subscribe to basic or standard TV service and have an analog TV, you might want to use a digital adapter. The digital adapter also offers some settings, for example, parental controls.
IR extenders enable you to hide a converter from sight while still having control with your remote by pointing it at a separate sensor. IR extenders connect through the USB port on your converter, usually located on the back of the converter.