Excellent product, I connected it to the garage door so that it functions as a button and it works perfectly.

It's incredible that this little thing works,
there really are no limits to what it can do.
For power, I used an old mobile charger

Impresses with its range, reliability, quality, size, weight, and cost. I have applied it in telecommunications, computers and peripherals, air conditioning, audio and video systems, consoles, household kitchen appliances, bathroom, living room, as well as security systems and home automation both inside and outside the house. The applications for vehicles are endless. I wish they sold them by weight and not by piece. Purchase price 4.56€

I am fully satisfied. I bought it and installed it in a coffee maker to make it "smart". It has not disconnected on me, it is about 10 meters away from the router. Its connection with the application worked immediately without any problems. I will definitely keep it in mind for future projects.

Good
From the photos it doesn't seem like it, but it is tiny (smaller than a matchbox), so be careful with the connections.