At a glance
| Spec | Detail |
|---|---|
| Product | Aqara UWB Smart Lock U400 |
| Brand | Aqara |
| Type | Smart Lock |
| Listed features | Apple Home Key · Fingerprint Deadbolt · Black |
| Amazon rating | 4.1 / 5 from 455 public ratings |
| Price at last check | $269.99 (Checked November 2026) |
| Shipping | Via Amazon.com — free on qualifying orders, typical transit 1-5 business days |
| Returns | Through Amazon — most items returnable within 30 days of delivery |
Worth it if it clears the category basics — entry methods and power life — at a price you like. 4.1★ across 455 buyers backs the call. At $269.99 it sits above the smart lock median we track ($170).
Buying a lever-style lock for an exterior door where a deadbolt belongs
Today price at Amazon: $269.99 (Checked November 2026)
Worth it if it clears the category basics — entry methods and power life — at a price you like. 4.1★ across 455 buyers backs the call. At $269.99 it sits above the smart lock median we track ($170).
Buying a lever-style lock for an exterior door where a deadbolt belongs
Today price at Amazon: $269.99 (Checked November 2026)
Specs and ratings are from the product's official Amazon listing, re-checked November 2026. Prices move — the Buy button shows Amazon's live price.
What it is
Smart deadbolts compared on keypad, fingerprint and app control — picks re-checked monthly. Based on the maker's official listing, the core promise here is: Apple Home Key · Fingerprint Deadbolt · Black. Full specifications are on the Amazon listing linked below.
What matters when choosing a smart lock
- Entry methods — fingerprint + keypad + app + physical key backup — more ways in, fewer lockouts.
- Power life — 8-12 months on 4 AAs is typical; check low-battery warnings and 9V emergency terminals.
- Ecosystem — works-with-Ring/Alexa/Google if you will use remote features.
- Deadbolt grade — BHMA grade and anti-bump cylinder still matter — electronics inside a mechanical lock.
How this listing scores on those points: Apple Home Key · Fingerprint Deadbolt · Black.
Who it fits
- Anyone who wants the boring spec-sheet homework done — the details are compared on this page so you don't have to open ten tabs.
Care
Swap batteries yearly on your birthday, and clean the keypad with a dry cloth — liquids kill membranes.
Where it sits in the lineup
Within the Aqara smart-lock family, this is the top of the range at $269.99. Siblings for comparison: at $49.98, at $169.99. Same construction across sizes — the price moves with the footprint, so the real decision is your bed size, not the model.
More guides
Best smart locks compared · Best mattress protectors · Best wet dry vacuums
