eufy FamiLock E40 Review: A 3D Face Unlock Deadbolt With a 2K Doorbell Built In
The eufy FamiLock E40 is an all-in-one smart deadbolt that combines a 2K video doorbell camera, a doorbell button and a lock in a single device, unlocked by 3D face recognition, a fingerprint, a keypad code, the app or a physical key. Buyers consistently rate it highly for how easy it is to install and how quickly the face unlock works, and there is no subscription because footage records to 32GB of built-in storage. The main trade-offs are that face recognition can occasionally miss people approaching the door, the camera stream is not exposed over Matter, and there is no Apple Home Key, NFC or microSD expansion at this price.
- Hands-free face unlock
- No-subscription local video
- Rentals and multi-user homes
- Matter, Apple Home, Google Home, Alexa and SmartThings users
Pros
- 3D face recognition plus fingerprint, keypad, app and physical key entry
- 2K camera, doorbell and 60 GHz radar motion detection in one device
- 32GB of local storage with no monthly subscription
- Matter support for Apple Home, Google Home, Alexa and SmartThings
- Dual battery system (15,000mAh main plus 800mAh backup), rated up to 6 months
- IP65 weatherproof and an easy DIY install on standard deadbolts
Cons
- Face recognition can miss people who approach without pausing
- Camera streams are not available over Matter
- No Apple Home Key, NFC or microSD expansion; storage is fixed at 32GB
- 2.4 GHz Wi-Fi only
- Premium price next to eufy's camera-free locks
Who is the Eufy FamiLock E40 for?
The FamiLock E40 is for anyone who wants the front door to both lock and watch itself with one device instead of buying a smart deadbolt and a video doorbell separately. It packs a 2K camera with a 135 degree head-to-toe view, a doorbell button and a 60 GHz radar motion sensor into the exterior keypad, and unlocks by 3D face recognition (up to 50 faces stored locally), a fingerprint, a passcode, the eufy app over direct Wi-Fi, or a physical key. It runs on a dual power system, a 15,000mAh rechargeable main battery rated up to 6 months plus an 800mAh built-in backup that keeps face, fingerprint and PIN entry alive when the main pack is low, and it is IP65 weatherproof (rated for roughly -22 to 158 F). It carries an ANSI/BHMA Grade 2 rating and works with Matter, which brings it into Apple Home, Google Home, Alexa and SmartThings, with Home Assistant reachable through Matter. It suits families who want hands-free entry, landlords who need temporary codes for contractors, and households where an older relative can simply stand in front of the door.
What buyers love
Installation and setup are the most repeated praises: buyers report swapping a standard deadbolt with just a screwdriver in about 20 to 30 minutes, following the in-app video guide rather than a paper manual, and then finding the eufy app intuitive to navigate. Face recognition is the standout feature, described as fast and a genuine convenience that ends the routine of hunting for keys, and it works in the dark and in the rain; fingerprint and keypad entry back it up. Owners also value the all-in-one design that replaces a separate deadbolt and doorbell, the loud doorbell chime, the notifications whenever the door is locked or unlocked, and how quiet the mechanism is. The dual battery system is repeatedly called out as a safeguard against being locked out by a dead pack. Renters and landlords like the temporary passcodes for contractors and cleaners, and several owners highlight the no-monthly-fee local storage as the reason they chose it over subscription cameras.
What to know before you buy
The most common caveat is face recognition at the edge of its range: it is quick when someone stands and looks at the lock, but a few owners find it misses people who only walk past or up to the door, such as delivery drivers, so a fingerprint or code remains the dependable fallback. The camera does not stream through Matter, so if you want the video inside Apple Home, Google Home, Alexa or SmartThings you use the eufy app instead; Matter is there for the lock and its smart-home integration. Storage is fixed at 32GB with no microSD slot, so you cannot expand it on the lock itself. There is no Apple Home Key or NFC tap-to-unlock, and Wi-Fi is 2.4 GHz only. Installation needs a standard US or Canadian single-cylinder deadbolt on a door about 35 to 55mm thick, not a round or non-standard faceplate or a mortise lock, and a storm door in front may block the camera view. At the price, it is a premium pick next to eufy's camera-free locks.
Is the Eufy FamiLock E40 worth it?
If you want one device that locks the door, answers it and records who came by without a subscription, the FamiLock E40 is a strong all-in-one: hands-free 3D face entry that buyers rate highly, fingerprint and keypad fallbacks, a sharp 2K camera with radar motion detection and night vision, 32GB of local storage, a dual battery system and Matter for Apple Home, Google Home, Alexa, SmartThings and Home Assistant. The compromises are the ones to accept up front: face recognition is convenient rather than flawless, the camera stream stays in the eufy app rather than Matter, storage is not expandable, and there is no Apple Home Key or NFC. For a household that wants the door to lock and watch itself, it earns its price; if you only need keyless entry and no camera, eufy's cheaper camera-free locks do that for less.
Frequently asked questions
Does the eufy FamiLock E40 require a subscription?
No. Video records to 32GB of built-in local storage with no monthly fee, and you can add an eufy HomeBase for more space and extra AI features. Live view, two-way talk, remote control and alerts all work without a paid plan.
Which smart home platforms does it work with?
It supports Matter, which brings it into Apple Home, Google Home, Alexa and SmartThings, and Home Assistant can control it through its Matter support. Note that the camera stream itself is not exposed over Matter, so live video and recordings are viewed in the eufy app.
How do you unlock the eufy FamiLock E40?
There are five ways: 3D face recognition (up to 50 faces, stored locally), a fingerprint, a keypad passcode, the eufy app over Wi-Fi, and a physical key. Face recognition is only used for unlocking, not locking.
How is it powered and how long does the battery last?
It uses a dual power system with a 15,000mAh rechargeable lithium main battery rated for up to 6 months of full functionality and an 800mAh built-in backup. When the main battery runs low, the backup keeps face, fingerprint and PIN entry working while other features pause.
Does it have a camera and a doorbell?
Yes. It has a built-in 2K video doorbell camera with a 135 degree head-to-toe view, night vision and a 60 GHz radar motion sensor that filters out pets and small objects to reduce false alerts. It integrates with the eufy ecosystem and a HomeBase 3 for extra AI security features.
Is it weatherproof and will it fit my door?
It is IP65 waterproof and rated for roughly -22 to 158 F (-30 to 70 C). It fits most standard US and Canadian single-cylinder deadbolts on doors about 35 to 55mm thick, but not round or non-standard faceplates or mortise locks; a storm door in front may block the camera.
