RR Crossings + control electronics

Aren't they HO?

The description says HO. But they also sell, very inexpensively, O scale crossing signals that could be substituted.

In the FWIW category, these WeHonest signals have been operating on a display shelf 15/7 for 2 1/2 years.  They have worked perfectly.

One note, the board would not hold the brightness setting once power was removed.  With a help request here on the forum, @stan2004 suggested changing the 0 ohm resistor for a 1k ohm at that location.  Worked exactly as he said. 👍

Thanks for the followups.  I originally post the wrong link to the HO set. This is the O set.
"O" guage crossing set