Questions about Aqara DCM-K01

Yes, it must. I would not recommend the models without a neutral conductor. I have read that they have a short service life and cause problems. It makes sense, because without a neutral conductor the appliance does not have a stable power supply.

Hello, Yes. The wiring diagram and type of installation are available on the aqara website. https://www.aqara.com/en/dual-relay-module-t2/

Yes, not quite right :). We will change the category, thank you for pointing it out.