Pair of RJ45-3.5mm Audio Jack Adapters It is a passive audio line extender, via Category 6 or Category 5e network cable. It basically connects the 3.5mm audio jack connector to a device such as a PC, connects the other adapter to a device such as an audio system, and connect the two LKADAT130 adapters via a regular network cable. This allows you to extend the audio signal up to 50 meters. Simple to use, no power or driver required for installation. Connectors: 3.5mm audio jack male RJ45 8 pin female