YoLinkSmart Power Fail Alarm, AC Power Outage Alert, LoRa Long-Range Wireless, Remote Monitoring, App Alerts, Text/SMS, Email Alerts, YoLink Hub Required!

Like everything else I’ve bought from YoLink, this device was a very quick and easy setup and works perfectly. It almost instantly gives a power fail alert. Just have to be sure that the hub and your wifi and router don’t lose power at the same time, or are equipped with battery backup.My only suggestion is a way to turn off the local alarm at the unit. It is overly loud and obnoxious. A plus in some uses but in my case I needed it silent so I had to take it apart to disconnect a wire.

We now have several Yolink devices. This power failure alarm/alert and several water leak detection devices. We use 2 hubs in two different buildings. I installed the power failure alarm as we have, in the past, had power failures during the late night and have slept several hours while everything was shut down. I don't like this. If the power goes off I want to know that some of our systems (internet, lights, freezers, refrigerator, AC/Heat) are down and also take some precaution for electrical surges when the power comes back up. We have had this device for a few months and during that time lost power and had the loud audible alarm wake us up and send us messages regarding the outage. (without power we get "offline" indications) Provides peace of mind. I like the devices we have used so far from Yolink. They seem to have good quality and function just as they are advertised.

Works great, easy to attach to the yolink app. I have a backup generator that does not connect to wifi. when I'm away this lets me know when normal power is off and when it is restored. The only draw back, it has a built-in audible alarm that can be turned down but not off, not a big deal just depends on were you install it as to whether it bothers you. On the app it can be set to cut off after as little as 10 seconds.

In case anyone wants to silence the siren on this like I did, peel off the 4 little rubber feet, unscrew the 4 hidden screws, pull the top and bottom apart, and then just snip the red and black wires going to the siren. Put it all back together and voila, you have a silent power outage detector. If you ever want to un-silence the siren, you can solder the wires back onto the board.While this workaround is quite simple, I don't understand why YoLink, as well as most of the other brands I've researched, don't include an easy option to silence the siren on these power outage detectors. I don't want to bother my neighbors with a loud siren. I just want to receive alerts if the power goes out.The best you can do without taking the thing apart is to set the siren to the shortest time possible: 10 seconds. Bafflingly, the app does have an option labeled "mute," but I have no idea what the mute option does--it certainly does not mute the siren.Aside from this, the detector work as described. Hopefully it will hold up better than my old one (MySpool, which did have a silent siren option but also began sending me multiple false alarms on a daily basis after a few months).

Easy setup. Tested by flipping the breaker to the outlet I had it connected to, and it correctly alarmed and then notified me once power was restored.Supplied power cable could be longer, but I had many others lying around that worked for my purpose.

This Yolink sensors are incredible and the fraction of the cost of other systems. I have these all over two houses that I own.

I have a generator for when hurricanes knock out the power. One problem I had was when power was restored I still was on generator for hours sometimes without knowing. Our service panel has an outside and inside circuit breaker boxes. The outside box feeds the main power to the house through box in the garage. The outside box also has the breakers for outside outlets and pool equipment. The generator connects to the garage box and has an Interlock only allows power from the generator or the outside box. I was able to put a water tite box near an outside outlet with the power monitor. I set it up to text me went the power is out and when it is restored. Yolink allows for 50 free texts a month for alerting. I also receive notifications on my phone with the YoLink app. This may not work the same if you only have one circuit breaker box. But it would tell you if the power goes out while you are away and when it is restored. Also important is I have a UPS connected to my router and YoLink hub, otherwise I would not get the power out alerts.

Easy to install and functions as designed. Could be a bit louder for my hearing, however my wife can easily hear it and says its annoying to her. Mission accomplished, she quickly alerts me so I can start backup generator!