Martin Extube User Manual page 28

first segment has DMX address 101, auto configuring will set the DMX
address of the first pixel to 101, the next pixel to 105, the next pixel to 109,
and so on until the last pixel is set to DMX address 117. The last pixel will
use channels 117 to 120 and channel 121 will be available for other
fixtures.
Monitoring fixture parameters
PCB voltage data and LED and PCB temperatures for each segment
MUM communicates with can be displayed in MUM's Monitor window.
28 Extube user manual