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.

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.

I'm happy with this siren and it is loud enough for me, but I am using it indoors. I might stick one outside and I'm sure it would be loud enough to put off any break ins.

I bought 3 of these to compliment my cameras, 1 for the drive, 1 for the back garden and 1 in the house, loud enough to disturb any would be thief, only weatherproof which is below expected standards for Eufy

Small compact siren,simple to sinc onto system,pity eufy dont do a bigger external audible/ visual one with flashing light,maybe in the future but for now I have one fitted outside under cover with intention of adding another.

Brilliant external siren.Need to place it hight enought tho as it would be easy to steal

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