Aqara UWB Smart Lock U400, Matter Over Thread, Apple Home Key, Fingerprint Keyless Entry Deadbolt,Touchscreen Keypad, Rechargeable Battery, Supports HomeKit, Alexa, Google, Home Assistant, Black
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Availability:
20 left in stock
Arrives
Monday, May 4
Color: Black
Features
- True Hands-Free Unlocking with UWB Technology: Experience a new era of smart access UWB (Ultra-Wideband) detects your incoming presence, direction, and intent to unlock automatically as you approach. It provides a faster, more convenient, and highly secure way to enter your home without touching the lock. Perfect when your hands are full, you're wearing gloves, or arriving in the rain. (Note: UWB unlocking requires a Thread-enabled Apple Home hub and is supported on Apple Watch Series 6 or later (excluding SE) running watchOS 11.5+ and iPhone 11 or later (excluding iPhone SE & iPhone 16e) running iOS 18.5+.)
- All-in-One Unlocking Options: Enjoy Apple home key tap-to-unlock (requires an Apple Thread-enabled Matter controller: HomePod 2nd Gen, HomePod mini, or Apple TV 4K 2021/2022), plus fingerprint, touchscreen passcode, voice assistant control, app remote access, NFC card support (card sold separately), and a physical key, giving you flexible, reliable ways to enter your home in any situation.
- Matter Over Thread for Multi-Ecosystem Compatibility: Built with Matter over Thread, the U400 can connect to multiple smart home platforms simultaneously, allowing you to enjoy the unique features of each ecosystem. Thread offers faster response, more stable connectivity, lower power consumption, and secure data transmission. Note: A Thread-enabled Matter controller from each ecosystem is required for its respective platform.
- Convenient Rechargeable Power System: Powered by a rechargeable and removable lithium battery that lasts up to 6 months per charge. Use the lock's USB-C port to recharge without taking the lock offline, or remove the battery and charge it separately. A low-battery voice alert will notify you when the battery drops below 20%, ensuring you never get caught off guard.
- Certified Security & Outdoor Durability: BHMA-certified for proven protection, mechanical strength, and long-term reliability. The IP65-rated exterior guards against dust and water for dependable outdoor performance. Plus, the rekeyable design allows you to change the physical key without replacing the entire lock cylinder.
- Unlock More Features with the Aqara App: Customize your security with Auto Lock, Night Latch Mode (only admins and physical keys can unlock at night), and Do Not Disturb Mode. Integrates seamlessly with Aqara cameras like the G5 Pro and G410 doorbell, allowing you to view visitors and unlock directly via live video interaction.
Brand: Aqara
Special Feature: UWB True Hands-Free Unlock
Lock Type: Deadbolt
Item dimensions L x W x H: 3 x 4.2 x 7 inches
Material: Aluminum
Brand Name: Aqara
Recommended Uses For Product: Watch the complete video for installation, app pairing, and operation.
Included Components: outer panel, inner panel, deadbolt, installation diagram, user manual, strike plate kit, mounting plate, adapter ring, mechanical key, mounting plate screwkit
Model Number: DL-D06E
UPC: 192784002131
Manufacturer: Lumi United Technology Co., Ltd
Unit Count: 1.0 Count
Additional Features: UWB True Hands-Free Unlock
Lock Type: Deadbolt
Control Method: App
Connectivity Protocol: Matter
Color: Black
Shape: Rectangular
Material Type: Aluminum
Item Dimensions: 3 x 4.2 x 7 inches
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, May 4
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
The Aqara U400 really changes the game when it comes to modern smart locks, especially with its ultra-wideband unlocking. It’s insanely fast, super smooth, and just works every time. I haven’t had a single issue since using it. It’s also a bit of a party trick—guests are always impressed when they see it unlock automatically, just like with the other smart features built into the lock. The locking and unlocking is noticeably quicker thanks to the updated motor. Even compared to the U100—which was already fast—this feels snappier and more precise. Everything about it feels solid and intentional. I’m also a big fan of the refreshed design. The U100 already looked modern, but the rounded edges on the U400 and the new anti-peep keypad (where the numbers stay hidden until you activate it) really give it a premium vibe. Another big win is the rechargeable battery. It’s just as reliable as the disposable batteries from the U100, but way more convenient. You can even hot-charge it, meaning you can plug it in and keep using it at the same time—huge plus. Feature-wise, it checks every box: facial recognition, fingerprint scanning, passcodes, NFC cards, automations, USB access, remote control, and even a physical key if you want it. Managing access is easy too, whether you’re setting up permanent users or temporary access for guests. Honestly, there’s not much to complain about. If I really had to nitpick, the lock is on the larger side—but that’s minor. If you’re shopping for a smart lock, this one pretty much ends the search. It does everything you’d want and then some. Another solid win from Aqara, and easily one of the best products in their catalog.
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Reviewed in the United States on January 20, 2026 by Air
Color: Black
We LOVE this lock! It is the best on the market currently with the walk-up to unlock technology. Please keep in mind that you do need an apple home assist or other similar smart home hub in order for it to work. The lock is great. It stores multiple users (we haven’t reached a limit yet) with multiple fingerprints and passcodes per user. It can be set to auto lock after a certain number of seconds/minutes. It also keeps a log of who unlocked the door, and I get notifications to my phone and smart watch. Also the battery lasts a long time. When we installed it, it was at 60% (we didn’t bother to charge it before using it), and now 2 months later it is at 48%. My kids and I love this lock with all of the easy ways to use it and the smart features.
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Reviewed in the United States on March 28, 2026 by Christine Carpenter
Color: Black
3.5/5: Overall an improved design but missing some features from the U100 Lock. The installation process is fairly straightforward. I think the only issue the instruction manual was unclear with is the wire on the interior side. I initially thought the wire would be pulled through and there would be some cavity on the lock for any excess to be tucked into. What you are supposed to do is to tuck the wire back into the deadbolt cavity once plugged in. The connectivity was rather seamless with both the M3 hub via Aqara app and the Home Assistant. I'm on android so I am still waiting for Google or Samsung to update their devices to support the new Aliro protocol to use UWB unlcok. Otherwise, fingerprint is as good as always. The locking mechanism sounds less of a high pitch wind. I liked the slimmer profile of the lock as well. The battery came delivered with a 20-30% charge which was kind of unusual for a new product. I plugged it into my phone charger directly and was surprised after nearly 2-3 hours of charging it only got to about 47% charge. So, definitely not on the fast charging side and you'd probably want to get a spare battery to avoid having a day or 2 where the battery of the lock is inactive due to charging (unless you hang a portable battery pack off the door handle as depicted). Lastly, its ability to detect the door status and close on door close is much better. I haven't noticed any False Positives in which the U100 was plagued with. I took a few stars off as the Home Assistant integration was a bit odd. I don't really know the specifics on the implementation but I'd wish that connecting it to the M3 Hub would result in it automatically appearing in the Home Assistant as an available device; however, that was not the case as I had to manually pair HA via matter separately. Another reason was the lack of feature parity with the U100. The main features I used that are missing is: 1. There's no swipe to lock as far as I can tell. This was a feature in U100 where, upon closing the door, you could tap the keypad to trigger the lock instead of relying on its auto lock functionality. 2. The push notification relies on a workaround via automation vs simply being a setting on the device to toggle. The push notification also does not contain any similar details like: who opened the door or how the door was unlocked (e.g. fingerprint, nfc tag, unlocked inside, key, etc.) Hopefully, these missing features come soon via a software update in the coming weeks and I can update the review but until then there's definitely some early adopter churn.
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Reviewed in the United States on January 13, 2026 by lamdav
Color: Black
Installation was easy, and unit works great. UWB unlocking is fantastic. Setting everything up was a little unintuitive from a software standpoint, but once figured out everything’s been straightforward and reliable. I love the design. The UWB auto-unlock and instant auto-relocking functions work fantastic. The motor is adequately strong for our needs. I really appreciate the rechargeable battery pack, which I’ve never seen in a smart deadbolt before. Fingerprint registering was a little finicky and troublesome but has worked great once setup. I’ve used closed to a dozen smart deadbolt locks over the past ten years and this is the first I’ve found that I think I’m completely satisfied with.
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Reviewed in the United States on January 11, 2026 by Evan