eufy SecuritySiren, 105 dB Wireless Alarm, IP65 Weatherproof, Remote Alerts, 2-Year Battery Life, HomeBase Required, Compatible with HomeBase S380 and S280, App Control, Easy to Install

This siren is a big step up from the Eufy home base alarm – it's noticeably louder and makes the system feel much more effective. I really appreciate that you can add multiple sirens through the Eufy app, which is great if you want alarms both inside and outside, or on different floors for better coverage. While it's not the loudest alarm I’ve ever heard, it's more than sufficient for most 2–3 bedroom homes. Id class it about the same loudness/ possibly slightly louder than a standard house fire alarm. Definitely a worthwhile addition to your Eufy setup so I highly recommend.

Not as imposing or loud as a traditional alarm box but can certainly be heard and turns the system into a proper alarm. Defiantly worth having.

The Eufy alarm system is decent and surprisingly easy to set up, but it's not without issue. The siren isn't great and it also draws attention to the base unit which is far from ideal. This external siren cures both those issues very cheaply and effectively. It's louder than the base unit, can be wall mounted and is just as easy to pair as everything else in the range. If you have the alarm system you really need to get this

I bought the Siren to add to my existing Eufy security setup, and overall, I’m happy with it. Setup was incredibly easy and it connected to my HomeBase straight away. It’s also compact and doesn’t stand out too much, which is great for discreet placement.A lot of reviews mention the volume, and yes, it’s not the loudest siren out there. If you're expecting an ear-piercing alarm, this might not be for you if you want to use it outside but indoors it definitely is loud enough. That said, it’s still loud enough to grab attention, especially indoors. I also like that you can adjust the volume and change the alarm tone, so it’s not overly harsh.One thing I appreciate is that it runs on battery backup as well, so it won’t stop working in a power cut. It also reacts instantly when triggered, and because it’s wireless, there’s no complicated installation.If you already have a Eufy security system and just want and extra layer of security, this is a decent addition. It’s not the most powerful siren but pacts a punch.

This siren turns the Eufy security system into an actual usable product - without it the pathetic homebase alarm isn't loud enough to even scare off a cat. This punches out a nice high-pitched siren - not very loud, it won't alert the whole street, but loud enough to alarm an intruder and wake up your next door neighbour.Like all Eufy products adding it into the mix is a breeze - quick and easy with the app.My big issue with this is it says install in a sheltered location as it's weather-resistant not waterproof. That's a big down side for me, as the whole point of a siren is surely to install it in an external location.

Someone said it was as loud as the homebase (which isn't loud at all but it was a bit louder)

Not a bad alarm easy to install but Could be louder I think I’ll buy another one so I can have one on the front of my house and one on the back.

Not really a siren more of a doorbell chime plus it needs a battery not impressed with this at all