USER MANUAL
Instructions before Installation
Device Installation & App Connection
Aqara Home Product Support
Before using this product, you need to download the Aqara Home app and register an account. This is not necessary if you directly
connect this product to a third-party ecosystem, however, unique features such as Night Latch mode, Auto-Lock settings and more
will be unavailable to you.
Outer Panel × 1
Adapter Ring × 1
Inner Panel × 1
Key × 2
Inner Panel Screw Kit
(PM3 × 12 mm)
User Manual × 1
Rechargeable Li-ion Battery ×1
(Rechargeable Li-ion Battery ×2
for Model: DL-D15D & DL-D17D only)
Deadbolt × 1Strike Plate Kit
Mounting Plate × 1
Hub M100
(for Model: DL-D06D & DL-D16D only)
Mounting Plate Screw Kit
(PM6 × 55 mm, PM6 × 65 mm)
Installation Diagram × 1
Bolt & Strike Plate Screw Kit
(KA4 × 25 mm)
Keypad
Speaker
NFC Area
Confirm Button / Lock Button
FingerprintUWB Indicator
Emergency Power Supply
(USB-C)
Return Button
Keyhole
Tip: Push down the sliding guide plate to
access the mechanical keyhole and unlock manually.
Set Button
Single press to enter pairing
or setup mode (aer binding).
Reset Button
Long press for 5 seconds to reset.
Magicpair Code
Scan to pair the lock to Aqara Home
Matter Pairing Code
Battery Charging Port (USB-C)
Battery Compartment
Rechargeable Li-ion Battery
Action Button
Battery Charging Port (USB-C)
Sign up for an Aqara Home account, then add the Smart Lock
U400 and follow the app’s instructions.
For FAQs, visit: https://store-support.aqara.com/products/smart-lock-u400
Or scan the following QR code to check the installation video
A PH1/ PH2/ PH3 standard Phillips head screwdriver is required for installation.
Tools necessary only for new doors or adjusting existing door holes: drill, hole saws, wood mortise chisel, pencil, tape measure, level
Note: If your borehole diameter is approximately 38mm, please ensure that the door is hollow for proper installation. If the door is solid, we recommend enlarging the borehole to 54mm
to accommodate the installation.
Drill Hole Saws Wood Mortise
Chisel
Pencil Tape Measure Level
2 ⅜ in
(
6
0
mm) or
2 ¾
in (70
mm)
0
10
20
30
4
0
50
6
0
70
1 ½ in (38 mm) or 2 ⅛ in (54 mm)
1
1
⅜
i
n
c
h
t
o
2
⅛
i
n
c
h
(
3
5
m
m
-
5
5
m
m
)
2 ⅜ in (60 mm)
2 ¾ in (70 mm)
2
OR
3
4
5
2 ⅛ in (54 mm)
1 ½ in (38 mm)
OR
6
7
8
9
10
Aqara Home App
Aqara Home
Aqara Home
Matter
Matter
FAQ
User Manual
Installation Video
...
Door Lock Local Settings
in a third-party app.
Note:
1. To connect Smart Lock U400, you will need a Thread-enabled Matter Controller of the desired ecosystem. Supported devices can be
found on our official website: https://www.aqara.com/us/explore/everything-matter/
2. Ensure that IPv6 is enabled on your local wireless network before connecting this Matter-enabled device to your smart home. IPv6 is
required for Matter ecosystem connection.
3. Make sure your phone and the Thread-enabled Matter Controller are under the same Wi-Fi network.
4. Bluetooth must be enabled during the binding process.
5. We recommend keeping the distance between the lock and the Thread-enabled Matter Controller within 5 meters. If there are
obstacles (such as walls) between them, keep the distance within 3 meters.
Additional Matter ecosystems binding:
1. Aer this lock is connected to a third-party Matter ecosystem or an Aqara Matter Controller in the Aqara Home app, the Matter Pairing
Code on the inner panel will expire.
2. To bind additional ecosystem, please generate a new pairing code in the bound app.
3. Press the lock's Set button once to enter pairing mode, and then use the generated Matter Pairing Code to add the device.
Note: In the early stages of the Matter ecosystem, different platforms support varying features. For example, some platforms do not
ecosystems.
support adding door lock passwords. For a better user experience, we recommend adding the device to the Aqara Home app.
4. Door lock will not function properly if calibration is not complete.
1. Control of this accessory requires a Thread-enabled home hub such as Apple TV 4K, HomePod (2nd generation), HomePod mini, or a
compatible third-party Thread border router running the latest soware. Hands-free unlock with home key is available with Apple
Watch Series 6 and later, excluding Apple Watch SE, running watchOS 11.5 or later and iPhone 11 and later, excluding iPhone SE (2nd
and 3rd generation) and iPhone 16e, running iOS 18.5 or later. Tap to unlock with home key is available for iPhone XS and later
running iOS 17.1 or later and Apple Watch Series 4 and later running watchOS 10.1 or later.
2. Aer connecting to Apple Home, the "Wallet" app will automatically generate the Apple home keys.
3. Apple, Apple Home, Apple Watch, HomePod, HomePod mini and iPhone are trademarks of Apple Inc., registered in the U.S. and other
countries and regions. The Works with Apple Home badge is a trademark of Apple Inc.
4. Use of the Works with Apple badge means that an accessory has been designed to work specifically with the technology identified in
the badge and has been certified by the developer to meet Apple performance standards. Apple is not responsible for the operation
of this device or its compliance with safety and regulatory standards.
Connecting to Aqara Home
Step 1: Download the Aqara Home app from the Apple App Store, Google Play or by scanning the provided QR code.
Step 2: Power on the device and then press the "Set" button once to enter pairing mode.
UWB Unlocking: Hands-Free Unlock with Apple home key (for iOS users)
Hands-free unlock with home key offers a convenient, precise and secure unlocking experience. When your iPhone or Apple Watch
is paired with the door lock in the Apple Home app, simply walking up to the lock will trigger it to open automatically. However, it
will not unlock if you merely pass by the door or linger near it. Only a clear intent to unlock will activate the door lock.
Note: For safety reasons, it only unlocks from outside.
When you add your lock to the Apple Home app, you’ll see an option to enable or disable Express Mode, which powers Hands-Free
Unlock with Apple home key. You can also toggle "Unlock on Approach" directly in the "Wallet" app:
1. Open the "Wallet" app on your iPhone.
2. Find your home key for the door lock.
3. Go to the settings page and switch "Unlock on Approach" on or off.
Note:
To enjoy hands-free unlock with home key, the "Unlock on Approach" feature must be enabled.
Step 3: Bring your phone near the device, open the app and tap "+" in the upper right corner of the homepage to enter the
Door Lock Setup Mode
To enter the door lock setup mode:
1. Aer adding your door lock to the app, single press the set button on the lock.
2. Verify the Aqara administrator's fingerprints or passwords to enter setup mode.
3. Follow the voice instructions to select desire features.
Connecting to an Aqara Matter Controller
Aer pairing the lock in the Aqara Home app, connect an Aqara Thread-enabled Matter Controller (e.g., Hub M3 ) to enable
remote features like Remote Periodic Password and Automations. You can also generate a Matter pairing code to connect the
lock to other Matter ecosystems or directly bind the lock to the Apple Home within the Aqara Home app.
Here's how to connect an Aqara Matter Controller and bind the lock to other Matter ecosystems via the Aqara Home app:
1. In the Smart Lock U400 setting page, tap "Add to Aqara Hub".
2. Tap "Connect" and follow the instructions to complete the binding.
3. Go back to the setting page and tap "Matter".
4. Tap "Matter Pairing Code" to generate a new code, or tap "Connect" to bind the device directly to the Apple Home app.
5. Scan or enter the Matter pairing code using a third-party app and follow the instructions to complete the binding.
Note:
1. Make sure your phone and Aqara Thread-enabled Matter Controller are under the same Wi-Fi network.
2. Bluetooth must be enabled during the binding process.
3. We recommend keeping the distance between the lock and the Thread-enabled Matter Controller within 5 meters. If there
are obstacles (such as walls) between them, keep the distance within 3 meters.
4. Once your Aqara Matter Controller is connected, the Matter pairing code on the inner panel will expire. To bind to other
"Add Accessory" page.
Step 4: Select "Smart Lock U400" and follow the instructions to complete the setup.
Note:
1. The actual operations are subject to change due to the updates in the Aqara Home app. Please following app’s instructions.
2. Bluetooth must be enabled during the binding process.
3. Enjoy more exclusive features with the Aqara Home app without needing a hub, within Bluetooth range.
Connecting to Matter Ecosystem
First Matter Ecosystem Binding:
1. Remove the battery cover on the inner panel.
2. Press the lock's Set button once to enter the lock pairing mode, then scan the Matter Pairing Code on the inner panel to add the lock
Matter ecosystems, please generate a new pairing code in the Aqara Home app.
Note: If connected only to the Matter ecosystem, administrator verification is not required to access the setup mode.
1. To adjust the Auto-Lock settings, please add the lock to the Aqara Home app. You can set your preferred re-lock delay by adjusting
the Auto-Lock Timer in the app.
2. When the Auto-Lock Timer is set to Immediately, please ensure the lock is fully engaged before leaving.
3. If the lock does not automatically lock aer the door is closed, please recalibrate the lock. Aer the calibration, fully open the door,
then close it from inside and lock it
Charging Methods
Two methods are available to charge the Smart Lock U400:
Method One:
Connect a USB-C cable to the battery charging port located at the bottom of the inner lock body. We recommend using a power bank,
which can be placed in a bag and hung on the door handle for convenient charging.
Method Two:
Remove the rechargeable Li-ion battery, then connect a USB-C cable directly to the port on the battery for charging.
Note: Once the battery is removed, the door lock will stop working. Please carry the physical key with you as a backup in case of
emergencies.
Emergency Power Supply
For temporary power in emergencies, connect a USB-C cable to the emergency powering port at the bottom of the outer panel. We
recommend directly attaching a power bank to the lock for emergency power. Additionally, smartphones that support USB-C to USB-C
connections can also be used to supply power to the lock.
Note: The USB-C port on the outer panel cannot be used to charge the lock's battery. To charge the battery, please connect a USB-C
cable to the inner lock body or remove the battery and charge it separately.
. This helps ensure the lock can correctly detect the door status.
Auto-Lock
If you have any questions or encounter any issues while setting up your device, you may refer to the FAQ, user manual and
UWB Indicator
installation video by scanning the QR code below, or visit our website for further assistance.
Online Customer Service: www.aqara.com/en/support.html
Manufacturer: Lumi United Technology Co., Ltd.
Address: Room 801-804, Building 1, Chongwen Park, Nanshan iPark, No. 3370, Liuxian Avenue, Fuguang Community, Taoyuan
Residential District, Nanshan District, Shenzhen, China
Email: [email protected]om
Aqara Home Product Support
Apple Home
Amazon Alexa
SmartThings
Home Assistant
Google Home
Homey
...
Buttons Features Operations
"0~9" Numeric
Keypad
Confirm/Lock
Button
Set Button
Reset Button
Enter Numbers
One-Time Quiet Unlock
Lock
Verify Password
Enter Pairing Mode
Single press any number.
Long press any number: Silences the keypad sound for a single unlocking
attempt. The sound will be restored automatically aer a successful
unlock or activating the keypad again.
Single press the Lock Button.
Single press the Confirm Button aer entering the password.
Single press the Set Button: Initiate pairing mode, allowing the app to
connect with the door lock within 10 minutes.
Single press (aer connecting to the app):
If an Aqara administrator has been set, the administrator’s credential
verification is required.
If no Aqara administrator has been set, the lock will automatically enter
setup mode.
Long press for 5 seconds:
If an Aqara administrator has been set, the administrator’s credential
verification is required.
If no Aqara administrator has been set, it will reset directly.
Long press for 5 seconds:
This will toggle on/o the Auto-Lock on Close feature.
Once door is closed, it automatically locks aer a set time. You can
adjust the auto-lock timer aer binding it to the Aqara Home app.
Reset Door Lock
Trigger preset
Aqara Home feature
Action Button
Setup Mode Features Operations
Add User
Delete User
Adjust Volume & Language
Reset Matter Binding
Door Lock Calibration
Press 1: Add users and register fingerprints and passwords
Press 2: Remove users and their credentials
Press 3: Customize volume and language settings
Press 4: Clear all Matter configuration
Press 5: Calibrate the door lock
Indicator Light Indication
Green (steady)
Auto-Lock on Close
Once door is closed, it automatically locks aer a set time
Aer a remote, automation, or 3rd party unlocking,
the door will automatically re-lock if not opened.
Safety Re-Lock
The battery level is low. Please recharge soon. The UWB feature will be automatically
disabled when the battery level drops below 8%.
The lock is using UWB proximity detection and will unlock when you're near.
The lock is using UWB proximity detection and will unlock when you're near.
Model
Product Specification
DL-D06E DL-D16E DL-D06D DL-D16D DL-D15D DL-D17D
IP Rating (Outer Panel)
Note:
1. For emergency charging the door lock, we recommend using a power bank to supply power via the Emergency Power Supply USB-C port on the front panel.
2. It is not recommended to continuously power the device via the Battery Charging Port on the inner panel during normal use.
Product Introduction
Powered by advanced Ultra-Wideband(UWB) technology, the Aqara Smart Lock U400 transforms your phone into a proximty-
based digital key. No taps, no codes—just approach, and the lock verifies your presence in real time, unlocking with pinpoint
accuracy.
What’s in the Box
Aqara Home
0 ~ 93% RH, no condensation
Rechargeable Li-ion Battery 7.3 V
USB-C Power Supply 5V
Bluetooth, Thread, UWB, NFC
Inner Panel: 178 × 76 × 46.9 mm (7.01 × 2.99 × 1.85 in.)
Outer Panel: 167 × 76 × 25.5 mm (6.58 × 2.99 × 1.01 in.)
IP65
Adding Apple home keys (for iOS users)
Aer setting up Smart Lock U400 in the Home app, add a home key to the Wallet app for easy and secure access to your home using
Door Lock Calibration
Aer installation and app connection, there are two ways to calibrate the lock: using the Aqara Home app or entering Door Lock
Setup Mode.
Here's how to calibrate directly on the lock:
1. Aer connecting to an ecosystem, single press the Set Button on the lock to enter Door Lock Setup mode.
2. Press the number "5" to enter Calibration Mode, then follow the voice prompts to complete.
3. Fully open the door, then close it from inside and lock it. This will ensure the lock can correctly detect the door status.
Note:
1. To avoid being locked out, please keep a key with you before starting calibration.
2. Ensure the door is closed and unlocked before calibration
3. Aqara administrator verification is not required to enter Setup Mode if the lock is only connected to the third party Matter
your iPhone or Apple Watch:
Enter Door Lock
Setup Mode
Yellow (steady)
Operating Temperature
Charging Temperature
-18°C ~ 55°C (-0.4°F ~ 131°F)
0°C ~ 40°C (32°F ~ 104°F)
Operating Humidity
Powering Modes
Wireless Protocols
Dimensions
Note: A compatible 2-in-1 Matter Controller and Thread Border Router is required for binding Matter ecosystems. For full access to
a specific Matter ecosystem's features, connecting via its corresponding Thread Border Router is recommended.
