# Aqara Smart Lock U400: specs and price

**Price (US):** $269.99 at aqara.com (Price $269.99 USD (lock only; Black or Silver) confirmed on us.aqara.com/products/smart-lock-u400 (listed as "Smart Lock U400 $269.99 USD" with Color: Black/Silver). No price is published on the aqara.com/en manufacturer product page (it links out to Buy Now channels).), as of 2026-07-25. A sourced, dated price of record — other retailers (incl. Amazon) may be lower. Among the 19 smart locks we track it is #12 cheapest of 19; category median $249.
**Brand:** Aqara
**Price tracked since:** July 2026

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | $269.99 |
| Brand | Aqara |
| Unlock methods | UWB hands-free unlock on approach (iPhone/Apple Watch), Apple Home Key tap-to-unlock (in Apple Wallet), fingerprint (up to 50 prints, 98.6% accuracy, 0.3s), touchscreen passcode (permanent/offline/scheduled), voice assistant, smartphone app, NFC card (sold separately), mechanical key |
| Connectivity | Thread; Matter over Thread; UWB (Ultra-Wideband); NFC |
| Matter | Yes |
| Auto lock | Yes |
| Battery type | Rechargeable removable Li-ion (USB-C recharge, up to 6 months per charge) |
| Finish options | Black, Silver |
| Install type | Replaces existing single-cylinder deadbolt — DIY |

## Where it stands

At $270, the Aqara Smart Lock U400 is #12 cheapest of the 19 smart locks we track, where the median is $249.

## Frequently asked questions

**How much does the Aqara Smart Lock U400 cost?**

The Aqara Smart Lock U400 has a US price of $269.99 (Price $269.99 USD (lock only; Black or Silver) confirmed on us.aqara.com/products/smart-lock-u400 (listed as "Smart Lock U400 $269.99 USD" with Color: Black/Silver). No price is published on the aqara.com/en manufacturer product page (it links out to Buy Now channels).), as of 2026-07-10.

**How does the Aqara Smart Lock U400 compare on price?**

At $270, the Aqara Smart Lock U400 is #12 cheapest of the 19 smart locks we track, where the median is $249.

**What are the Aqara Smart Lock U400's key specs?**

Aqara Smart Lock U400 (Aqara): unlock methods UWB hands-free unlock on approach (iPhone/Apple Watch), Apple Home Key tap-to-unlock (in Apple Wallet), fingerprint (up to 50 prints, 98.6% accuracy, 0.3s), touchscreen passcode (permanent/offline/scheduled), voice assistant, smartphone app, NFC card (sold separately), mechanical key, connectivity Thread; Matter over Thread; UWB (Ultra-Wideband); NFC, matter Yes, auto lock Yes, battery type Rechargeable removable Li-ion (USB-C recharge, up to 6 months per charge). Full sourced spec sheet verified 2026-07-10.

Source: https://www.aqara.com/en/product/smart-lock-u400/ (aqara.com, accessed 2026-07-10)
Corroboration: https://us.aqara.com/products/smart-lock-u400 (accessed 2026-07-10)
Canonical: https://frontdeskreview.com/product/smart-locks/aqara-smart-lock-u400/
Cite: Per The Front Desk Review, the Aqara Smart Lock U400 price of record was $269.99 as of 2026-07-10 — https://frontdeskreview.com/product/smart-locks/aqara-smart-lock-u400/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl