At Home
Eufy Video Smart Lock Review


Peer reviewed by Kirk MacDowell

Home Security Expert

We have been relying on traditional locks and keys for centuries, and they have proven to be rather reliable. However, ‘smart’ gadgets have shown us that even the simplest tools we use every day can be improved, and the same is true for locks and keys.

Video Smart Lock S330 Black

Last Amazon price update was: July 22, 2024 6:11 am

In this review, we will take a look at the Eufy S330 video smart lock to show you one of the best products you can use to make your home even more secure and convenient. We will look at all the features, benefits, and potential drawbacks you can consider to choose whether this innovative device is right for you.

Overview Of Eufy 3-In-1 Video Smart Lock

As the name suggests, the Eufy S330 Video Smart Lock has 3 functions in one. Put simply, these functions include a 2K HD video camera, a doorbell, and a smart lock. Naturally, we will look at each of these functions in more detail throughout the review, but it gives you an idea of how versatile this one device can be.

In the past, we have looked at similar locks such as the Kwikset SmartCode 914 and the Kwikset Aura models. These are both great options, and in this review, we will see that Eufy has provided an option that can easily go head-to-head even with these fine devices.

If you would like a more visual look at what this device has to offer, you can check out this video for a deep dive into everything on offer.

Importance Of Video Smart Locks In Home Security

While a fairly new innovation, video smart locks have already made home security so much easier by offering you many different options. Not only that, but they have also made it a lot more convenient to monitor your door and choose what to do.

In an age where thieves are getting smarter and bolder, the more you can protect your home the better. With any security device, you always hope to never need to experience the security functions it provides, but even if you’re lucky enough to achieve that the convenience features are nice to have. Your front door is often the first place thieves will try to break in, and we have also seen how porch pirates can snag parcels and mail that you haven’t had a chance to retrieve.

The versatility of the Eufy S330 Video Smart Lock, with its high-definition video capabilities, fingerprint recognition, and remote control via a mobile app, showcases the future of home security. It’s not just about keeping unwanted visitors out; it’s about managing access to our homes in a way that’s secure, intelligent, and adaptable to our daily routines. This smart lock is a testament to the power of technology to enhance our sense of security and peace of mind at home.

Kirk MacDowell, Home Security Expert

That is why having an extra set of eyes watching your front door can help to make you much safer and more aware!

We have previously looked at 4 ways you can improve your home security, and you will see that a smart lock fits very well into this system.

Eufy Security S330 Video Smart Lock 3-In-1 

Now, we will look at the main features and benefits included with the Eufy 3 in 1 smart lock.

Key Features And Benefits

3-In-1 Innovative Integration (2K HD Cam + Doorbell + Smart Lock)

Earlier, we mentioned that there are 3 components to this device. First, you have the 2K HD camera. This high-resolution camera will allow you to see whoever is at your door. This way, you can confirm whether a friend or family member is over to visit or if there is perhaps someone trying to break in.

This means that it’s great for security and everyday convenience.

Next, you have the doorbell. This basically functions as you would expect, as the doorbell will ring when the button is pressed and you will be able to see who is at the door.

Finally, there is the smart lock feature. The device uses some pretty nifty technology to make locking and unlocking the device easy as can be. First, there is a fingerprint reader. AI technology will learn over time and make this process even faster.

You can also use voice commands or the app itself to unlock the door remotely, giving you plenty of options.

.3s Fingerprint Recognition, 1s Unlocking

As we touched on previously, the fingerprint unlock feature is fast, unlocking in around 0.3 seconds. This ensures that you won’t be standing around while the lock has to analyze your fingerprint.

Remote Control and Access Management from Eufy Security App

The lock can be managed and accessed via the app, so you will be able to view the camera feed and even unlock the door straight from the app.

2K HD Resolution Clear Real-time View

The video camera attached to the lock has a crisp 2K resolution that should allow you to see even finer details in many different lighting conditions. As we touched on previously, this allows you to see who is at the door straight from your phone and then act accordingly.

Dual Motion Detection Doorbell

False alarms can get annoying if your doorbell picks up every single movement, but luckily the Eufy S330 uses AI to differentiate between people, animals, and even objects like tree branches to minimize false alarms.

Google Play And iOS Integrated App

The Eufy app is super easy and convenient, but you can also connect the doorbell directly to Google Assistant and Alexa for added convenience. The app is also integrated right into the Google Play and iOS stores.


The S330 has a simple design that comes in two main components: one section on the outside and one on the inside. The outer device is the more complex of the two, but it is still rather simple. It has a sleek black design with a fingerprint scanner on top and a keypad on the front. The doorbell button is also found on this side.

The inner component is a simple black rectangle with a latch that can be used to unlock the door manually.

Setup And Installation

Installing the device can take a bit of work, but you will have everything you need to get it done. This video showcases what you will need to set up the device. You can also confirm the dimensions of your door on the product page in order to ensure your door is compatible.

Once installed, you can then link it to the app and you will be good to go!

Performance And Reliability

As with all Eufy products, the build and reliability of the device is quite robust. The device is waterproof and durable, and stress testing showed the lock still functioned after 200 000 unlocks. It’s all simple to use, of excellent quality, and unobtrusive, making it convenient and handy for everyday use.

Pros And Cons

As we have seen throughout this Eufy S330 review, there are many benefits to this smart device. You have three main functions, paired with AI learning, crisp 2K visuals, and advanced motion detection. On top of this, it’s also highly convenient and easy to use.

In terms of downsides, it does take a bit of effort to install, and some doors may not be compatible with the design

Customer Service And Support

Eufy offers several ways that you can contact them for support or queries. These can be found on their contact page. You can email them, call them directly or use the online chat feature if you are in the US or UK. No matter which method you choose, you can rest assured that you will be able to resolve any problems or issues.


Is It Worth Buying A Smart Lock?

We absolutely think a smart lock is well worth it, as you will make your door not only safer but also a lot more convenient. Unlike some security devices, this one has common uses that are just nice to have.

Are Smart Locks Safer Than Key Locks?

Smart locks do provide more safety, as it would be much harder for someone to just steal your physical key and gain entry. The smart lock also alerts you to any activity so you can see what’s happening and deal with it accordingly.

Which Is Better, Arlo Or Eufy?

This is a tricky question to answer, as both companies provide excellent products with their own pros and cons. One benefit Eufy does have over Arlo is that there are more features that you can use without a subscription, whereas Arlo does require a paid subscription to access many features.

Do Video Doorbells Get Stolen?

Unfortunately, there is a chance that a video doorbell can get stolen, but it would be quite difficult for a thief to extract the device. The smart lock design of this video doorbell makes it significantly more difficult, too. If someone does manage to steal it, you will at least be able to view who stole it to potentially track them down.

Does The Eufy 3-In-1 Video Smart Lock Camera Record Without Wifi?

Footage can be stored locally without a wifi connection, but a connection will be required to access all features.

How Do You Unlock The Eufy 3-In-1 Smart Lock If The Battery Dies?

The smart lock will send an alert to your phone when the rechargeable battery is low, so hopefully, you won’t encounter a flat battery too frequently. If it does happen, however, you can unlock the door manually using one of the included physical keys.

Conclusion And Where To Buy

In conclusion, we think that the Eufy S330 is an excellent addition to your frontline of home defense. We really like that the doorbell has great security features for added safety while also functioning as a convenient everyday video doorbell that you can use for common situations. If you wish to purchase one for yourself, you have a few different options. You can buy one from the Eufy store, Amazon, and Best Buy to name a few possibilities. No matter where you choose to buy it, we are confident you will be very happy with the quality features and convenience that this device will bring you.