Aqara
Smart accessAqara U400 Review Guide: UWB, Matter over Thread & Door Fit
Current buying option
Aqara UWB Smart Lock U400
Current price & availability · purchase link
Open the named listing to compare the live price, availability, delivery, seller, and return terms.
A practical guide to Aqara's UWB deadbolt, with the controller, phone, door-fit, battery, and regional-version checks that determine whether its hands-free entry features make sense.
Decide before the product image
- Best for
- Apple households that want UWB hands-free entry plus local backup methods
- Verify on Amazon
- Confirm ASIN B0FRS6T6HL, the exact regional version, finish, seller, and included accessories.
Editorial image for visual context; the linked listing may have a different product appearance or configuration.
Related search answers
Buying assessment
Use the decision points below to compare fit, compatibility, ownership trade-offs, and the exact current listing.
Quick verdict
Best fit
Apple households that want UWB hands-free entry plus local backup methods
Main upside
UWB approach unlocking on supported devices
Check first
Advanced ecosystem features require compatible controllers and phones
What matters most
- Updated
- July 16, 2026
- Decision scope
- Fit, compatibility, ownership, and current-listing checks
- Version risk
- Aqara lists UWB approach unlocking as the U400's differentiating feature.
- Price or bundle risk
- Confirm ASIN B0FRS6T6HL, the exact regional version, finish, seller, and included accessories.
Current product and listing
- Current listing
- Amazon ASIN B0FRS6T6HL
- Product name
- Aqara UWB Smart Lock U400
- Model or bundle
- Aqara UWB Smart Lock U400
- Confirm before buying
- Aqara lists UWB approach unlocking as the U400's differentiating feature.
- Live buying conditions
- Confirm ASIN B0FRS6T6HL, the exact regional version, finish, seller, and included accessories.
What can change before checkout
- Page updated
- July 16, 2026
- Exact product
- Amazon ASIN B0FRS6T6HL
- Price and availability
- Check the merchant page for the current price, coupon, stock, and delivery
- Seller and returns
- Confirm the selected seller, included bundle, warranty path, and return terms before ordering
Product facts
- Exact product
- Aqara UWB Smart Lock U400
- Brand
- Aqara
- Best use case
- Apple households that want UWB hands-free entry plus local backup methods
- Category
- access
- ASIN
- B0FRS6T6HL
- Price band
- $$$$
Compatibility checks
- Aqara lists UWB approach unlocking as the U400's differentiating feature.
- The manufacturer requires a compatible Thread-enabled controller for ecosystem integrations.
- Battery life is an estimate under stated conditions, not a guaranteed interval for every door.
Key specifications
| Spec | Value to verify |
|---|---|
| ASIN | B0FRS6T6HL |
| Primary network | Matter over Thread |
| Entry methods | UWB, fingerprint, keypad, Home Key, NFC, app, physical key |
| Door type | Compatible single-cylinder deadbolt; verify dimensions |
| Battery | Rechargeable; Aqara states up to 6 months under stated conditions |
| Weather | Exterior assembly rated IP65 |
| Before buying | Confirm regional version, phone support, Matter controller, and Thread border router |
Fit decision guide
Best when
Your priority is apple households that want uwb hands-free entry plus local backup methods and the exact listing matches the specs below.
Main trade-off
Advanced ecosystem features require compatible controllers and phones
Also compare
Fingerprint and Apple Home Key entry without paying for UWB
Confirm before checkout
Aqara lists UWB approach unlocking as the U400's differentiating feature.
Bottom line
The U400 is the stronger Aqara choice for a compatible Apple-centered home that specifically values approach-based UWB unlocking. Buyers who mainly want fingerprint, keypad, or Apple Home Key access can spend less on the U100.
Why it matters
UWB is the headline feature, but the lock still has to fit a single-cylinder deadbolt and connect to the correct Matter controller or Thread border router. The exact regional version and household phone support matter more than the logo list.
The reason to buy the U400
Choose it for UWB approach unlocking, not merely because it is the newer model. Fingerprint and keypad entry already cover most daily routines on cheaper locks.
Compatibility comes in layers
The lock, phone, Matter controller, Thread border router, and chosen ecosystem each play a role. Confirm the exact path for every household member before installation.
Door fit and fallback
Measure the existing deadbolt and door before checkout. Keep the physical key available and decide where the rechargeable battery will be charged before it becomes urgent.
Where it wins
- UWB approach unlocking on supported devices
- Matter over Thread and Apple Home Key support
- Fingerprint, keypad, NFC, app, and physical-key fallbacks
Trade-offs
- Advanced ecosystem features require compatible controllers and phones
- Single-cylinder deadbolt and door measurements must be checked
- A rechargeable battery creates a charging routine
What to verify
- Aqara lists UWB approach unlocking as the U400's differentiating feature.
- The manufacturer requires a compatible Thread-enabled controller for ecosystem integrations.
- Battery life is an estimate under stated conditions, not a guaranteed interval for every door.
Who should buy it
Consider Aqara UWB Smart Lock U400 if your priority is apple households that want uwb hands-free entry plus local backup methods and you want a product that fits your smart-home setup without adding unnecessary complexity.
Who should skip it
Skip it if the trade-offs above touch your main use case. The better buy is usually the product whose size, setup, accessories, and return path match your situation.
Compare nearby options
| Product | Best for | Check first | Price band | Exact listing |
|---|---|---|---|---|
| Aqara UWB Smart Lock U400 | Apple households that want UWB hands-free entry plus local backup methods | Advanced ecosystem features require compatible controllers and phones | $$$$ | ASIN B0FRS6T6HL |
| Aqara Smart Lock U100 | Fingerprint and Apple Home Key entry without paying for UWB | Aqara hub is required for remote and broader third-party functions | $$$ | ASIN B0BZSD2L1W |
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Comparisons featuring this product
Comparison
Aqara U400 vs U100: Which Smart Lock Fits Your Entry Routine?
Compare UWB and Matter over Thread with fingerprint, Apple Home Key, Zigbee, hub requirements, batteries, and door fit.
Comparison
ULTRALOQ Bolt SE vs Aqara U400: Fingerprint Value or UWB Entry?
Compare daily entry, Matter over Thread, UWB, fingerprint, controllers, batteries, door fit, fallbacks, and the price premium.
Version and price risk
Treat the exact listing as part of the product. Confirm the model number, hardware revision, included accessories, seller, coupon state, and return path before checkout. Current link note: Confirm ASIN B0FRS6T6HL, the exact regional version, finish, seller, and included accessories.
Before you buy
- Confirm the exact model, region, wiring or door fit, required hub, and supported ecosystem before ordering.
- Check the retailer listing, seller, bundle contents, return window, and subscription boundaries.
- Keep a dependable local fallback for entry, climate, cameras, and essential automations.
- Check for recurring quality-control patterns after confirming the exact model.
Sources and methodology
We have not tested this product ourselves. This guide uses current manufacturer documentation and listing checks to identify fit, compatibility, version, and purchase risks.
References checked
- Aqara U400 product page — Features, compatibility, battery, weather rating, and installation requirements.