eufy Security FamiLock S3 Max E85V0 Video Smart Lock with Palm Vein Access

Use the eufy FamiLock S3 Max at a busy front entrance to check visitors, view the door from inside, and unlock without reaching for a key. It combines a deadbolt, video doorbell, and interior screen in one device.

Palm vein recognition provides a hands-free unlocking method, while app and voice controls add other ways to manage entry. A PIN and physical keys offer additional access options.

The 2K camera has a 150° head-to-toe view, and built-in 16GB storage keeps video on the device. The interior screen lets household members see the entrance without opening a phone app.

Pros

This integrated setup brings door access and visitor monitoring together, so you can check who is outside before deciding how to respond. The camera’s wide head-to-toe view is useful for seeing visitors and packages near the entrance, while motion detection and real-time visitor alerts help keep you informed.

Palm vein access is designed for quick, key-free entry, with recognition stated at 0.6 seconds. The product stores palm vein information locally and supports up to 50 family members. Buyers often praise the lock’s ease of use, while opinions on palm recognition vary. Feedback on battery life and connectivity is also mixed, so those experiences are not the same for every household.

The essentials

FamiLock S3 Max combines a Wi-Fi deadbolt with a 2K HDR doorbell camera, an internal video screen, and 16GB of built-in eMMC storage. Its aluminum construction and BHMA Grade 1 designation identify it as a front-entry lock designed for residential and other listed door uses. The camera’s 150° head-to-toe view supports a broader look at the doorstep than a lock alone can provide.

Access methods include palm recognition, the app, voice control, a PIN, and physical keys. It supports Matter and smart-home platforms including Apple Home, Google Home, Alexa, and SmartThings. Camera streams are not supported through Matter, use the eufy app for the full camera experience. The lock works with HomeBase 3 and is not compatible with HomeBase 2.

Its dual-power system uses a rechargeable battery and four AAA batteries for emergency power. If the rechargeable battery runs low, the AAA batteries provide essential PIN-based lock and unlock access, other functions are unavailable in that backup mode. The stated rechargeable-battery life is up to four months, with up to one additional month of essential functionality from the AAA batteries.

Best use cases

Choose this all-in-one approach if you want a smart deadbolt and a doorbell camera in the same entry setup, rather than managing those as separate devices. It suits households that value a view of the front door from inside, app or voice access, and multiple ways to unlock. For installation, the stated compatible door thickness is 35–55 mm. A storm door in front may obstruct the camera’s view, so consider the entrance layout when positioning the lock.

Questions before you buy

Can household members check the entrance without using a phone? Yes. The rear lock screen displays the front-door view, providing an on-device way to see who is there.

Can it connect to smart-home systems? It supports Matter and integrations with Apple Home, Google Home, Alexa, and SmartThings. For camera streaming and the full video feature set, use the eufy app.

What happens if the rechargeable battery runs low? The included AAA batteries provide emergency power for PIN-based locking and unlocking. Other functions are unavailable in this backup mode.

Buying verdict

FamiLock S3 Max is a practical fit for an entryway where keyless access and visitor visibility belong in one device. Its palm recognition, interior screen, wide-view 2K camera, and built-in storage make it especially useful for households that want to manage the front door from both sides of the entrance.