Signal converters are compatible with a variety of connection types, and can be extremely useful for extending connections. Most common cable types can lose connection quality over more than a few metres. A signal converter can strengthen the signal, or switch to a more reliable cable type. Use two boxes, or a balun extender kit, to convert a connection to cat5 for a stronger connection over long distance cables. Other connection types include HDMI, VGA video, dual digital audio, and AV receivers. Converters can also be used for older electronics with permanent cables, to allow you to use them with your current system.