RHL 4n1 Quad Receiver

This board is along with the 4n1 Quad Transmitter board is designed to allow you to extend four outputs over one Ethernet cable. It is recommended that you use a shielded cable for these boards to provide a ground return. Nominally the forums use these boards without the ground, which assumes that a ground return will exist through the AC power lines. While this works in most cases, it is not best practice. A shielded cable will just cost you a little bit more.