It´s offering 8 Channels, 4 buffered ins & 4 buffered outs.
Each channel does have a duo LED for signal indication (red – positive / green – negative)
Suitable for audio & CV.
Please don´t use crossover wires for connecting both modules!!!
Otherwise you will throw the whole world into an irreversible, multi dimensional time glitch …. 😀
Use regular CAT5 wires likes this here