Purchased along with my systems Fohhn Linea III Live in early 2010.
This is the PC interface ---> RS485 to communicate with the network Fohhn.
The management software EQ, dynamics, delay, high cut and low cut Fohhn Audio Soft Fohhn corresponds via the network (via the multicore and audio if required) through this case NA-1.
Sturdy and practical, he does his job. It is still very expensive for an accessory that can not happen. It increases the overall cost of systems and it is a pity.
We can not live without it!