The Smart Device Compare comparison

Aqara Smart Lock U400 vs Eufy FamiLock E32

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Aqara Smart Lock U400 and Eufy FamiLock E32

A summary of selected recorded differences between these door locks. Check the full specification table below for details and conditions.

Feature differences among your selected devices

2.4 GHz Wi-Fi (connectivity): Aqara Smart Lock U400 — No; Eufy FamiLock E32 — Yes (Built-in Wi-Fi, no bridge required (official eufy product page and Amazon listing)).
Other (connectivity): Aqara Smart Lock U400 — Yes (UWB (Ultra-Wideband), NFC); Eufy FamiLock E32 — No.
Apple Home Key (lock system): Aqara Smart Lock U400 — Yes (Tap to unlock and UWB hands-free unlock with iPhone or Apple Watch (requires Thread-enabled Apple Home hub)); Eufy FamiLock E32 — No.
Bluetooth (lock system): Aqara Smart Lock U400 — Yes; Eufy FamiLock E32 — No.

Specifications to check side by side

Backup Battery (power): Aqara Smart Lock U400 — USB-C Emergency Port; Eufy FamiLock E32 — No.
Battery Life (power): Aqara Smart Lock U400 — 6 months; Eufy FamiLock E32 — 8 months.
Battery Type (power): Aqara Smart Lock U400 — Built-in; Eufy FamiLock E32 — 8 AA.

Information still to confirm

5 of 45 comparison fields lack a resolved value for at least one selected device. Missing information is not evidence that a feature is absent.
Check the full table and manufacturer documentation before ruling out a device.

These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.

Compare capabilities, compatibility and setup requirements.

Option 1 · Aqara

Aqara Smart Lock U400

Last updated October 2026

View full device profile

Option 2 · Eufy

Eufy FamiLock E32

Last updated October 2026

View full device profile

What the catalog tells us

Understand the tradeoffs.

These counts describe the available data, not a quality score. More features do not automatically make a better device.

8differences with recorded values for every device

5rows with missing or unspecified information

Consider your setup

Battery Life

Aqara Smart Lock U4006 months
Eufy FamiLock E328 months

Compare the stated test conditions. Catalog battery figures alone do not predict runtime in your home.

Inspect the specifications

Your priorities, side by side

Focus on what changes.

Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.

Differences onlyMy priorities (0)

Showing 45 of 45 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Door Lock Unlock

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Real-time notifications and event history in the eufy app

Low Battery Alert

Aqara Smart Lock U400: Yes
Catalog note
Low battery notification when battery level drops to 20%
Eufy FamiLock E32: Yes
Catalog note
Low-battery alerts through the app (official eufy FAQ)

Multiple Unlocking Failure Alert

Aqara Smart Lock U400: Not recorded
Eufy FamiLock E32: Not recorded

Tamper Proof Alert

Aqara Smart Lock U400: Yes
Catalog note
Forced entry and door left ajar alerts
Eufy FamiLock E32: Not recorded

Automatic Lock

After Door Closed

Aqara Smart Lock U400: Yes
Catalog note
Built-in gyro sensor detects the door closing and locks automatically
Eufy FamiLock E32: Yes
Catalog note
Countdown auto-lock, with customizable timing from 2 seconds to 5 minutes (official eufy FAQ)

Away

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Geolocation

Aqara Smart Lock U400: Not recorded
Eufy FamiLock E32: Not recorded

Connectivity

2.4 GHz Wi-Fi

Aqara Smart Lock U400: No
Eufy FamiLock E32: Yes
Catalog note
Built-in Wi-Fi, no bridge required (official eufy product page and Amazon listing)

5 GHz Wi-Fi

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Bluetooth

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Matter runs over Thread, which uses Bluetooth Low Energy for commissioning

Other

Aqara Smart Lock U400: Yes
Catalog note
UWB (Ultra-Wideband), NFC
Eufy FamiLock E32: No

Thread

Aqara Smart Lock U400: Thread Border Router required
Eufy FamiLock E32: Thread Border Router required
Catalog note
Matter runs over Thread, so a Thread border router such as a HomePod mini or Apple TV 4K is needed for Matter control (official eufy FAQ)

Z Wave

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Zigbee

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Features

Anti Peep Password

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Anti-Peep Passcode (official eufy product page)

Doorbell

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Emergency Fingerprint

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

One Time Password

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Temporary passcodes via Access Management in the eufy app

Periodic Password

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Scheduled passcodes via Access Management in the eufy app

Integrations

Alexa

Aqara Smart Lock U400: Yes
Catalog note
Via Matter over Thread: Aqara lists Apple Home, Home Assistant, Google Home, Amazon Alexa and Samsung SmartThings, each needing a Thread-enabled Matter controller of that ecosystem.
Eufy FamiLock E32: Yes
Catalog note
Via Matter

Apple Home

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Via Matter

Google Home

Aqara Smart Lock U400: Yes
Catalog note
Via Matter over Thread: Aqara lists Apple Home, Home Assistant, Google Home, Amazon Alexa and Samsung SmartThings, each needing a Thread-enabled Matter controller of that ecosystem.
Eufy FamiLock E32: Yes
Catalog note
Via Matter

Home Assistant

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Via Matter

Matter

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: Yes
Catalog note
Matter over Thread (official eufy product page FAQ)

SmartThings

Aqara Smart Lock U400: Yes
Catalog note
Via Matter
Eufy FamiLock E32: Yes
Catalog note
Via Matter

Lock System

Apple Home Key

Aqara Smart Lock U400: Yes
Catalog note
Tap to unlock and UWB hands-free unlock with iPhone or Apple Watch (requires Thread-enabled Apple Home hub)
Eufy FamiLock E32: No

Bluetooth

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: No

Face Recognition

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Fingerprint

Aqara Smart Lock U400

Yes

Eufy FamiLock E32

Yes

Manufacturer source

Fingerprint access is supported.

Eufy FamiLock E32 manufacturer product page →

Source section: Model-specific product page summary
Model: Eufy FamiLock E32
Region: US manufacturer page; other regional variants are not verified by this source
Firmware: Not specified by this source
Checked: 2026-10-04

Battery life is a manufacturer estimate, not a guaranteed replacement interval.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Self-learning AI fingerprint recognition

Nfc Tag

Aqara Smart Lock U400: Yes
Eufy FamiLock E32: No

Passcode

Aqara Smart Lock U400: Yes
Catalog note
Touchscreen keypad
Eufy FamiLock E32: Yes
Catalog note
Touchscreen keypad

Physical Key

Aqara Smart Lock U400: Yes
Catalog note
Rekeyable mechanical key
Eufy FamiLock E32: Yes

Remote

Aqara Smart Lock U400: Yes
Catalog note
Aqara Hub / Thread Border Router required for remote access
Eufy FamiLock E32: Yes
Catalog note
Built-in Wi-Fi, no bridge required; control from anywhere in the eufy app

Power

Backup Battery

Aqara Smart Lock U400: USB-C Emergency Port
Eufy FamiLock E32: No

Battery Life

Aqara Smart Lock U400

6 months

Eufy FamiLock E32

8 months

Manufacturer source

The advertised battery life is up to eight months.

Eufy FamiLock E32 manufacturer product page →

Source section: Model-specific product page summary
Model: Eufy FamiLock E32
Region: US manufacturer page; other regional variants are not verified by this source
Firmware: Not specified by this source
Checked: 2026-10-04

Battery life is a manufacturer estimate, not a guaranteed replacement interval.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Battery Type

Aqara Smart Lock U400: Built-in
Eufy FamiLock E32: 8 AA

Sensors

Open Close

Aqara Smart Lock U400: Not recorded
Eufy FamiLock E32: No
Catalog note
Auto-lock is a countdown timer set in the app, with no door-position sensor documented

Video

2k Video

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Customizable Area

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Hd Video

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Internal Storage

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

microSD card slot

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Motion Detection

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Night Vision

Aqara Smart Lock U400: No
Eufy FamiLock E32: No

Range Of Detection

Aqara Smart Lock U400: Not applicable / unspecified
Eufy FamiLock E32: Not applicable / unspecified

Specifications for Aqara Smart Lock U400 versus Eufy FamiLock E32
Specification	Aqara Smart Lock U400	Eufy FamiLock E32
Alerts
Door Lock Unlock	Yes	Yes Catalog note Real-time notifications and event history in the eufy app
Low Battery Alert	Yes Catalog note Low battery notification when battery level drops to 20%	Yes Catalog note Low-battery alerts through the app (official eufy FAQ)
Multiple Unlocking Failure Alert	Not recorded	Not recorded
Tamper Proof Alert	Yes Catalog note Forced entry and door left ajar alerts	Not recorded
Automatic Lock
After Door Closed	Yes Catalog note Built-in gyro sensor detects the door closing and locks automatically	Yes Catalog note Countdown auto-lock, with customizable timing from 2 seconds to 5 minutes (official eufy FAQ)
Away	No	No
Geolocation	Not recorded	Not recorded
Connectivity
2.4 GHz Wi-Fi	No	Yes Catalog note Built-in Wi-Fi, no bridge required (official eufy product page and Amazon listing)
5 GHz Wi-Fi	No	No
Bluetooth	Yes	Yes Catalog note Matter runs over Thread, which uses Bluetooth Low Energy for commissioning
Other	Yes Catalog note UWB (Ultra-Wideband), NFC	No
Thread	Thread Border Router required	Thread Border Router required Catalog note Matter runs over Thread, so a Thread border router such as a HomePod mini or Apple TV 4K is needed for Matter control (official eufy FAQ)
Z Wave	No	No
Zigbee	No	No
Features
Anti Peep Password	Yes	Yes Catalog note Anti-Peep Passcode (official eufy product page)
Doorbell	No	No
Emergency Fingerprint	No	No
One Time Password	Yes	Yes Catalog note Temporary passcodes via Access Management in the eufy app
Periodic Password	Yes	Yes Catalog note Scheduled passcodes via Access Management in the eufy app
Integrations
Alexa	Yes Catalog note Via Matter over Thread: Aqara lists Apple Home, Home Assistant, Google Home, Amazon Alexa and Samsung SmartThings, each needing a Thread-enabled Matter controller of that ecosystem.	Yes Catalog note Via Matter
Apple Home	Yes	Yes Catalog note Via Matter
Google Home	Yes Catalog note Via Matter over Thread: Aqara lists Apple Home, Home Assistant, Google Home, Amazon Alexa and Samsung SmartThings, each needing a Thread-enabled Matter controller of that ecosystem.	Yes Catalog note Via Matter
Home Assistant	Yes	Yes Catalog note Via Matter
Matter	Yes	Yes Catalog note Matter over Thread (official eufy product page FAQ)
SmartThings	Yes Catalog note Via Matter	Yes Catalog note Via Matter
Lock System
Apple Home Key	Yes Catalog note Tap to unlock and UWB hands-free unlock with iPhone or Apple Watch (requires Thread-enabled Apple Home hub)	No
Bluetooth	Yes	No
Face Recognition	No	No
Fingerprint	Yes	Yes Manufacturer source Fingerprint access is supported. Eufy FamiLock E32 manufacturer product page → Source section Model-specific product page summary Model Eufy FamiLock E32 Region US manufacturer page; other regional variants are not verified by this source Firmware Not specified by this source Checked 2026-10-04 Battery life is a manufacturer estimate, not a guaranteed replacement interval. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Self-learning AI fingerprint recognition
Nfc Tag	Yes	No
Passcode	Yes Catalog note Touchscreen keypad	Yes Catalog note Touchscreen keypad
Physical Key	Yes Catalog note Rekeyable mechanical key	Yes
Remote	Yes Catalog note Aqara Hub / Thread Border Router required for remote access	Yes Catalog note Built-in Wi-Fi, no bridge required; control from anywhere in the eufy app
Power
Backup Battery	USB-C Emergency Port	No
Battery Life	6 months	8 months Manufacturer source The advertised battery life is up to eight months. Eufy FamiLock E32 manufacturer product page → Source section Model-specific product page summary Model Eufy FamiLock E32 Region US manufacturer page; other regional variants are not verified by this source Firmware Not specified by this source Checked 2026-10-04 Battery life is a manufacturer estimate, not a guaranteed replacement interval. Document check only; not a hands-on test or verification of every regional or firmware variant.
Battery Type	Built-in	8 AA
Sensors
Open Close	Not recorded	No Catalog note Auto-lock is a countdown timer set in the app, with no door-position sensor documented
Video
2k Video	No	No
Customizable Area	No	No
Hd Video	No	No
Internal Storage	No	No
microSD card slot	No	No
Motion Detection	No	No
Night Vision	No	No
Range Of Detection	Not applicable / unspecified	Not applicable / unspecified

Know what’s behind the comparison.

The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.

Read our comparison methodology