In the operation manual, it's stated that Neutron is sending MIDI via USB. Here's what can be read at page 9:
(107) USB PORT – Connects to a computer via standard USB cable. The Neutron
will display in your DAW as a class-compliant USB MIDI device, capable of
sending and receiving MIDI information.
Out of pure curiosity, without being cocky, I wonder what MIDI data Neutron is sending?