Review on Upgrade Your Home Automation With Yasorn WiFi Smart Switch 4 Pack - Control Your Lights Anywhere Via Alexa, Google Home, IPhone, & Android App by Andy Tran

So I don't know what to rate these as. Installed one. With a traditional US market device, I would expect the input side to be the device power, and the output side to be an open/close relay triggered by the device, and closing completely isolated contacts. THIS IS NOT THE CASE. The input side feeds the output side, so your Line and Neutral on the input side get connected to Line and (I think) Neutral on the output side when relay is closed. This was a little shocking (literally) and took a test light to figure out (plus getting shocked). Moreover, the Line and Neutral were flipped versus the labeled inputs too, so the neutral seemed to be getting closed, with nothing happening with the line, so I had to flip the wires in order to have the line output close when triggered. Now the reason you'd normally isolate these is so you can control higher amperage or a different circuit with the relay. This really doesn't make much sense, especially since they also (I think) make a DC/AC unit with different voltages. So I don't get it. Is this unit defective? Maybe, but it's working great in this configuration for a couple of days and hasn't fried yet. I have a 6 pack, so waiting with baited breath to try the next one, and then I'll update this review if it works the same. Regardless, this is pretty weird for a controller, and I'd reckon with this approach that there are probably decent chances on burns your house down. Caveat Emptor. FYI, no problem adding it to SmartLife - held the button for 10 seconds, went into some other mode where a wifi network popped up, directly connected, SmartLife was a little slow but eventually found it, then synced with google home.