Siren, 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.

Another great addition to my security system. Easy to set up like all Eufy products, easy to mount thanks to a swivel on feature. Includes 2yr batteries. I like you can amend the sound level as it is loud which is exactly what I wanted. Compliments a single camera as an alarm or a full system. This works with my 8 cameras and door sensors perfectly.

I was reluctant to purchase the siren after the reviews I have seen for the product, but I was pleasantly surprised. The siren is quite loud, but of course, it could do to be louder in some circumstances. Indoor use, you won't have a problem with at all, but outdoor use, it can be a little too quiet depending how loud an environment you live in. If you want to make the most of this siren outside, you need multiple, but they are quite affordable for the most part. They released this product originally with a sound that was more like a reversing truck than an actual alarm, but I can say it has since been updated and now sounds like the product it's supposed to be. The settings in the eufy app for this siren are quite lacking; not that an alarm needs that many features, but after initial setup, there isn't even a way to test the loudness without setting off a trigger. At least they have fixed the alarm delay. There is only low and high options, and it is automatically set to low by default. So if you think it is too quiet, do check the settings options first. I will be getting more of these to put outside, both front and back of my house. It is IP65 weather resistant, not waterproof like the rest of their products, so be careful where you decide to place it. But it's well worth it's money, and I am impressed 👍

Part of the Eufy Alarm and cctv system. Works very well. I have 2 front and Back. Easy to set up, installation and the app does everything for you. Very loud, never had a problem. Would 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 was pleased as punch to find out there was a "loud and audible" siren for my security system, was easy to setup as all eufy items are. Going through testing and how dissapojntwd was I, seriously my grand jack russell can produce louder gas than this waste of money. I don't have no doubt my propery is no more secure than before. I really think that I've wasted far to much money on this junk.

Ideal and loud fits well in any open space another good edition added to my eufy collection

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.