eufy Video Smart Lock S330 Review: A Clever 3-in-1 Lock, Doorbell and Camera With Motion-Detection Caveats
A unique deadbolt that combines a fingerprint lock, a 2K camera and a doorbell with local, subscription-free storage, but motion detection and long-term reliability can be uneven.
The eufy Video Smart Lock S330 is a genuinely unusual product: a 3-in-1 deadbolt that is also a 2K camera and a doorbell, so you replace a lock and a video doorbell with a single device. Owners love that combination, the sharp 2K video with night vision and two-way audio, the many ways to unlock (fast fingerprint, per-person codes, the app from anywhere, and a physical key), and the fact that video records locally to a microSD card or HomeBase with no subscription. Access is logged with video, making it great for guests, dog walkers or Airbnb, and the included chime is loud. The recurring weakness is motion detection: many owners find the human-detection AI misses people walking up and often fails to record package deliveries, though eufy has repeatedly improved this via firmware, and pairing with a HomeBase3 boosts accuracy. Reliability is the other concern, a minority report the lock dying after about a year, a sticky deadbolt/motor, or a firmware update breaking auto-lock and sensors, and the built-in rechargeable battery (only one included) can need charging every few weeks to a few months. Alexa support is limited to a doorbell chime announcement, not voice control, and there is no HomeKit or Matter. Customer support gets frequent praise for making things right. If you want an all-in-one lock plus camera without subscriptions, it is compelling, just go in aware of the motion-detection and reliability caveats.
- An all-in-one lock, camera and doorbell
- Subscription-free local video storage
- Guest, rental or dog-walker access with video logs
- Alexa, Google Home or Home Assistant users
Pros
- Unique 3-in-1: fingerprint lock, 2K camera and doorbell in one
- Sharp 2K video with night vision and two-way audio
- Local, subscription-free storage (microSD, built-in, or HomeBase)
- Many ways to unlock, with video-logged, per-person access
- Easy swap install and a loud included chime
- Responsive customer support that pushes firmware fixes
Cons
- Motion detection can miss people and package deliveries
- A minority report the lock dying or firmware breaking features after ~1 year
- Single built-in rechargeable battery needs charging every few weeks to months
- Alexa support is chime-only, not voice control; no HomeKit or Matter
- Initial electronic setup can be confusing
Who is the eufy S330 for?
This is a 3-in-1 Wi-Fi deadbolt that combines a fingerprint smart lock, a 2K camera and a doorbell, aimed at people who want to replace both a lock and a video doorbell with one device. It unlocks via fingerprint, a keypad passcode, the app remotely, and a physical key, records video locally (microSD up to 128GB, built-in storage, or a HomeBase) with no subscription, and works with Alexa, Google Home and Home Assistant. It runs on a built-in rechargeable battery, is IP65 rated, and includes a plug-in chime. It best suits those who want an all-in-one lock plus camera, subscription-free local storage, and video-logged access for guests, rentals or dog walkers. If you need rock-solid motion capture, HomeKit or Matter, or true Alexa voice control, read the caveats first.
What buyers love
The standout is the all-in-one design: owners struggle to find any other device that is both a door lock and a security camera, and they love not needing two separate systems. Video quality is a highlight, with sharp 2K footage, good night vision, and two-way audio that lets you talk to visitors (you can even set one-tap pre-recorded replies). Storage is local and subscription-free, to a microSD card, built-in storage or a HomeBase, and one owner logged over 700 motion events across 100 days in under 3GB. There are many ways in, a fast fingerprint reader, unique per-person codes, remote app control from anywhere, and a physical key, and every entry is logged with video, so the app tells you exactly who unlocked the door and when, which owners find perfect for family, dog walkers or Airbnb guests. Installation is usually a quick swap on a standard deadbolt with an adjustable-length bolt, the included chime is loud enough to hear across the house and alerts your phone, and pairing with a HomeBase3 makes the human/pet AI notably more accurate. It integrates with the wider eufy ecosystem, and customer support earns repeated praise for pushing firmware fixes and replacing units to make things right. Owners also like the value compared with Ring or Schlage.
What to know before you buy
The most consistent complaint is motion detection. Many owners find the human-detection AI misses roughly half of people walking up and frequently fails to capture package deliveries, an issue eufy has repeatedly addressed with firmware updates (which have fixed it for some owners) and that improves with a HomeBase, but you may need to raise sensitivity and accept more false alerts and shorter battery life. Reliability is the other concern: a minority report the lock dying after about a year despite a charged battery, a sticky deadbolt or weak motor, or a firmware update breaking auto-lock, the door sensor and battery reporting. Auto-lock can behave erratically, and a known cause is that the setting does not sync across multiple phones logged into the same account, correcting that (and using the right per-app settings) resolves it for many. The battery is a built-in rechargeable with only one included, lasting anywhere from a few weeks to a few months depending on use and settings, and taking several hours to charge, so a spare battery is a common recommendation. Alexa support is limited to announcing the doorbell as a chime, not voice control, and there is no Apple HomeKit or Matter. A few other notes: initial electronic setup can be confusing (you must pick the exact device type before scanning the serial), the provided deadbolt strike plate is not ideal for standard doors, the bolt hole needs enough depth to calibrate, and you need good Wi-Fi near the door. The app also pushes upsells for other devices and cloud storage.
Is the eufy S330 worth it?
For anyone who wants a single device that is a lock, a camera and a doorbell with no monthly fees, the eufy Video Smart Lock S330 is a compelling and fairly unique choice. The 2K video, two-way audio, local storage, per-person coded and fingerprint entry, and video-logged access are genuinely excellent, and support is responsive when issues arise. The trade-offs are real: motion detection can miss people and deliveries (better with firmware updates and a HomeBase), a minority hit reliability or firmware problems, the single built-in battery needs regular charging, and Alexa is chime-only with no HomeKit or Matter. Buy it if the all-in-one, subscription-free concept appeals and you can live with tuning motion settings and possibly buying a spare battery; if you need dependable, catch-everything motion capture or deep Apple integration, consider a separate lock and video doorbell instead.
Frequently asked questions
How good is the motion detection?
It is the most common complaint. Many owners find the human-detection AI misses people walking up and often fails to record package deliveries. eufy has repeatedly improved it through firmware updates, which fixed it for some owners, and pairing with a HomeBase3 makes detection notably more accurate. Raising sensitivity helps but adds false alerts and shortens battery life.
Does it need a subscription for video?
No. Video records locally to a microSD card (up to 128GB), built-in storage, or a HomeBase, with no monthly fee. Live view, two-way audio, doorbell alerts and event logs all work without a subscription, and you can download clips you want to keep to your phone.
How is the battery, and how often do I charge it?
It uses a built-in rechargeable battery, and only one is included. Depending on use and motion settings, owners report it lasting anywhere from a few weeks to a few months, and it takes several hours to fully charge, so many buy a second battery to swap in. There is a physical key if the lock is ever unpowered.
Does it work with Alexa, Google Home or Apple HomeKit?
It works with Google Home and Home Assistant. Alexa support is limited, it only announces the doorbell press as a chime on an Echo, not full voice control of the lock or video. There is no Apple HomeKit or Matter support.
Is it hard to install?
The mechanical install is usually a quick swap on a standard deadbolt, with an adjustable-length bolt. The electronic setup can be confusing, you must select the exact S330 device type in the app before scanning the serial, the bolt hole needs enough depth to calibrate, and you should charge the battery first and ensure strong Wi-Fi near the door.
