Actually the fine print says they are passive and DC not required but it does have some clever design so that DC bias will be passed through if needed.
Great choice of frequency ranges.
This is how AI hurts us. On many smaller jobs where a skilled recordist would have been understood as essential to pull useable dialog out of a bad situation now maybe it’s just a camera mic or a clip-on with a run through whatever plugins and it’s good enough. Producer pockets the ~$1000 they would have paid a sound mixer and gets a feather in their cap for coming in under budget.
https://www.customsyncslates.com/timecode-faceplates
in my experience the camera dept gets these made.
Also…
https://www.englishstix.com/custom-slate-design/
And…
https://www.nolaslates.com/products-1