Outdoor Alarm Controller 2, Five Years Battery Life, 110dB Outdoor Siren, Optional 12VDC in, 1/4 Mile Open-Air Range, 110dB Siren Included, Hub Required for Full-Functionality!

Constantly exceeding my expectations. I own a lot of Yolink hardware and am deep into Home Automation with Home Assistant. All work seamlessly. After using a lot of the devices for a long time, I had one failure. The App on my phone let me know there was an issue. Therefore, the system (includes all of the components) are monitored for health. A rare and complete level of Systems Engineering. On the one failure, I emailed Yolink with the results of the very simple and straight forward troubleshooting. Boom. They were sending me a replacement in minutes. Absolutely outstanding. I have not seen a company at this level in a while. It brings tears of joy to my eyes to find a company like this one. I can only hope that other companies take notes and follow this outstanding example.

I have many Yolink products and this was one of the essential reasons I got into Yolink in the first place - building an alarm system with no subscription fees that was 100 percent under my own control and which doesn't require Internet connectivity or cloud dependence. Like my other Yolink products, (water shut-off valve, leak detectors, temp sensors, outlets, etc) this is well-made and solid and not some cheap piece of plastic. A hub is required to get any of it functional, but they practically give those away with their equipment bundles so it's no big deal. I have this siren indoors and it's loud enough for that purpose, but it's inaudible from outside and I don't think would be very useful if even mounted outdoors. But inside it works fine, for outside I put two (non-Yolink) outdoor sirens that are VERY loud when activated by two Yolink power outlets, which are set to power on when the system is armed and tripped. I originally purchased two Yolink "alarm fobs" which - to my complete bafflement still to this day - are not capable of arming/disarming the alarm system. For that I needed a "Flex Fob", which I purchased instead and returned the first ones. The Flex Fobs do the arm/disarm task, plus they not only have two additional buttons available for other tasks, (I use the others to open/close my garage door), but they also have short & long-press configurations for each button, so there's actually 8 actions available for each fob. (4 buttons x 2 actions each button.) All of it can function independent of any wi-fi network or Internet connection, although obviously Internet would be needed to send out notifications. The Yolink app can be somewhat confusing, especially when it comes to configuring an alarm system. I needed to consult quite a few of their support documents to get this dialed in correctly, but once you understand the mechanics of the Yolink app and how it wants to do what it does, it gets easier to work with. It's far too complicated a process to go into here, but basically it amounts to enabling or disabling an alert policy, therefore "arming" or "disarming" the alarm system. (Disabling makes alerts do nothing, enabling makes it trigger other devices and send out notifications or whatever you configure it to do.) Yolink support documentation is there for help, and their tech support is also very good - twice I had to contact them regarding linking devices and why the original "alarm fob" wasn't arming my alarm. Both times they responded quickly in English and got me through my problems. I don't use any motion detectors so I can't attest to them, but I assume they work as well as the rest of my Yolink devices. Their contact sensors, temp sensors, and leak sensors have all worked flawlessly, hub configuration was painless, integration with Alexa was equally painless, and although it took some puzzling on how to configure everything in the alarm system, in the end it's been money very well spent.

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I really like how loud it is. I also like how it is a plug in so I don’t need to worry about running out of battery. Another reason that I like it is, how it can be used with ring alarm pro system. (This required a little more work. I followed the instructions of someone’s post on Reddit, surprisingly it really works. ) Every time my Ring alarm pro triggers, this siren is blaring very loud.

Picked up the hub and a bunch of extra window sensors, then tied them all to a Scene for when we're "away". When this is triggered, the siren is frighteningly loud, easily equals or surpasses the siren on our ADT system. I'm using this indoors, but I may indeed buy a second one for outdoors. While I like the battery backup idea, I wonder if it makes sense to sell a separate, and less expensive version for those who don't need that feature. Great product overall, but will revisit if it fails within a 5 years period, especially knowing that it *shouldn't* get much use, if any.