The wire leads clip on to a DCC bus, and the left end of the device connects to a micro USB cable. All valid DCC packets are sent to the host, which can display them in various ways.
The DCC signals are optically-isolated from the USB.
The USB protocol is open. A Host program to display DCC packets and provide them via a TCP server to multiple clients is included in Olin's Depot software.
Prototypes were demonstrated working at the NMRA HUB Division model
railroad show on 6-7 December 2014 in Marlborough MA, and at the Amherst
Model Railroad Society model railroad show on 24-25 January 2015 in West