Manual
User Guide
2026-07-15
eufy Smart Lock E40
$299.99
- Face Unlocking: Enjoy quick, seamless entry with advanced facial recognition. With a detection range of 1.3 - 3.3 ft and height support from 3.9 - 7.2 ft, access is effortless for every family member. Accurately recognizes you with or without makeup, glasses, or hats, and works across all skin tones. All data is stored locally for complete privacy.
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All-in-One Device: FamiLock E40 combines a 2K HD camera, doorbell, and smart lock to keep every moment in sight and your home secure. The 2K camera delivers clear details day and night, while the 135° head‑to‑toe view provides full‑body coverage for easy monitoring of visitors and deliveries.
- Dual Power Supply: Stay powered with a 15,000mAh rechargeable lithium battery offering up to 6 months of full functionality, and an 800mAh built-in backup battery that automatically activates when power is low, ensuring uninterrupted operation.
- High-Precision Radar, Fewer False Alarms: High-precision 60 GHz radar cuts false alarms by 95%, accurately detecting human motion while filtering out pets, small objects, and wind interference. This delivers precise real-time alerts and reduces unnecessary wake-ups for longer battery life.
- Seamless Smart Home Integration: Easily integrates with the eufy Ecosystem and HomeBase 3 for advanced AI security features. Supports Matter for smooth, secure connections with Apple Home, Google Home, Alexa, and SmartThings—giving you a privacy-first, future-ready smart home experience. Note: Camera streams are not supported via Matter due to current limitations. For full features and the best experience, please use the eufy app.
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$299 . 99
Products Comparison
eufy Video Smart Lock E40
$299.99
Fast Unlocking: Face Unlocking
Resolution: 2K HD
Built-In Wi-Fi: Direct Wi-Fi
Motion Detection: ✅
Battery Type: 15,000mAh + 800mAh
Battery Life: 6 Months
Waterproof: IP65
eufy Ecosystem Compatibility:Doorbell, Cam, and HomeBase 3
Smart Home Compatibility: Matter, Apple Home, Alexa, Google Home, SmartThings
ANSI / BHMA: Grade 3
eufy FamiLock S3 Max
$399.99
Fast Unlocking：Palm Vein Unlocking
Resolution：2K
Built-In Wi-Fi: Direct Wi-Fi
Motion Detection: ✅
Battery Type: 15,000mAh + 4 AAA
Battery Life: 5 Months
Waterproof: IP65
eufy Ecosystem Compatibility:Doorbell, Cam, and HomeBase 3
Smart Home Compatibility: Matter, Apple Home, Alexa, Google Home, SmartThings
ANSI / BHMA: Grade 1 (Best)
Video Smart Lock S330
$349.99
Fast Unlocking：Fingerprint
Resolution：2K
Built-In Wi-Fi: Bridge with Chime (Included)
Motion Detection: ✅
Battery Type: 10,000mAh
Battery Life: 3 Months
Waterproof: IP65 (Camera Only)
eufy Ecosystem Compatibility: Doorbell, Cam, and Alarm Kit
Smart Home Compatibility: Alexa, Google Home
ANSI / BHMA: Grade 3
FAQ
What kind of doors are eufy Smart Lock E40 compatible with?
Compatible with most standard doors with a thickness of 35–55 mm. Installation is not recommended on doors with a storm door in front, as it may block the view. If your latch recess is round, contact eufy Support to get a round drive-in faceplate.
Which eufy devices and systems are eufy Smart Lock E40 compatible with?
It supports connections with HomeBase 3, HomeBase Mini, HomeBase Pro, and eufy smart displays. Without a Homebase, it can also link to most eufy cameras, allowing you to remotely lock or unlock the door via live view on any device.
Does eufy Smart Lock E40 support integration with other smart home platforms?
It supports the Matter protocol, allowing integration with smart home ecosystems such as Apple Home. Currently, it cannot connect to HomeBase 3 and external smart home ecosystem gateway simultaneously. Please contact us for a solution if needed.
What should be noted when using the facial unlocking function?
You can store facial information for up to 50 family members. Facial recognition can only be used for unlocking, not locking.
What is the power supply method of this door lock? What happens if the battery runs out?
The door lock uses a dual power supply with a main battery and a built-in backup. When the main battery is low, the backup provides emergency power for facial recognition, fingerprint, or PIN unlocking; other functions are unavailable.
*Push notifications with thumbnail previews require thumbnail preview images to be temporarily stored in the cloud.
**If you choose to use cloud-based features such as Cloud Backup or push notifications with thumbnail previews, videos or thumbnail previews will be sent to the cloud as needed to provide your selected features.
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