Amazing tool, in an incredibly small size. The option between DC + AC power supply is very convenient.
Be careful in case of a power outage, the switch remains open (it is a NO switch).
It also works as a WIFI repeater (but with poor results, so no one should buy it for that purpose)

Very good and high-quality product. It should be noted that it can also function as a dry contact. It also has a particularly small size to fit better.

Well, the device is amazing. Its response, the connection, and the functions it offers would have cost a lot more money and also a lot of effort a few years ago! In my case, I took the commands from the 2 garage doors and directed them separately to 2 Shelly 1 plus devices. From my iPhone via Siri with voice commands, I can open and close them, either one or the other or both. It opens the door to countless automations and with a little reading, it works wonders. No comparison to Sonoff.

- update: after a year of daily use, they don't have any issues. (4 pieces)

Excellent. I am impressed by the ability for Range extender on WiFi. I also appreciate that in the future the ability for Bluetooth in combination with the BLU series from Shelly will be very useful to me. It goes without saying that it is compatible with home assistant, excellent cloud and local operation

I connected it to a power outlet for AC power transfer and it had minimal power, just enough for the tester's light to barely illuminate. I had an electrician look at it, but we couldn't fix it. I don't know if I received a defective one, I just didn't bother with it further.

It's a perfect switch. I have it in a single light fixture and it works both with the switch and via wifi. The only requirement is to have a neutral wire or to pull one from the upper box and do a little digging to fit it.

The best smart mini relay for installing behind switches to control lighting.

It works with both a switch and a button, and the mobile application is one of the best I have encountered.

I have also connected it to the Google Nest Mini for voice commands.

I have installed a second one on the panel, which controls the water heater through a load relay. It functions as both a timer and a chronometer.

One of the best purchases.