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By Aqara

Aqara Smart Auxiliary Lock U400 with Hub M100 Bundle (Matter)

HK$3,388
HK$3,388
Shipping calculated at checkout.
Color: Silver
Just HK$1,000 to get free shipping!
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Purchase and service information

Please book in advance for showroom visits, purchases or collection.

Supply and receipts

Product sourcing and authorised-stock details follow each product page. Ask us about supply and receipts before ordering.

Warranty and support

Warranty duration, provider and coverage depend on the brand and model. Services follow the agreed scope.

Free technical consultation

Free one-to-one smart-home installation advice is available. On-site installation, wiring and setup are quoted separately.

Delivery and appointments

In-stock items, preorders and service appointments have different schedules. Please confirm availability and dates before ordering.

Brand: Aqara
Aqara 智能輔助鎖 U400 連 Hub M100 套裝 Matter
HK$3,388
HK$3,388

Installation measurement

Measure the door to see if this lock is suitable.

Fill in the door thickness and door material for an immediate preliminary assessment. You can WhatsApp LINKO with the results to confirm the installation.

此鎖適用門厚 35–60mm。香港木門多數 40–45mm。

點樣量？閂實門，用間尺量門邊最厚嗰段（唔好量門框）。有鎖孔就一齊量門邊到鎖孔中心（邊距）。

1 側視 · 量門厚

用間尺量門邊最厚，唔好量門框 唔好量門框 門厚

用間尺量門邊最厚嗰段，唔好量門框。

4 正視 · 量邊距

由門邊量到鎖孔正中，常見 60 或 70mm 邊距 鎖孔中心 60 / 70mm

由門邊量到圓孔正中。

1. 門厚度

mm

2. 門材

3. 而家有冇鎖孔

4. 門邊到鎖孔中心（邊距）

上門購買、自取或參觀示範，請事先預約。

This is a preliminary estimate; the final cost is subject to the actual door, openings, and lock body on-site.

Inventory · Installation

Looking to check inventory or schedule an installation?

Please include the product name and SKU in your inquiry to help us verify stock, lead time, equipment compatibility, and installation arrangements. Please provide your existing equipment model or usage environment so we can offer more accurate recommendations.

Check Inventory / Model Number Inquiry about installation

The Aqara U400 Smart Lock features advanced UWB precision positioning technology, combining dynamic encryption with nanosecond-level time-of-flight ranging to enable ultra-fast, hands-free automatic unlocking as you approach the door. Its rugged aluminum alloy body is paired with a matte PMMA panel, offering an IP65 waterproof rating and compliance with US BHMA security standards.

This product supports the Matter over Thread protocol, allowing for seamless integration with major smart home platforms including Apple Home, Google Home, Amazon Alexa, and Samsung SmartThings. In addition to UWB hands-free unlocking, it supports a variety of access methods such as fingerprint, passcode, NFC, and Apple Home Key, providing comprehensive security protection.

Key Features

Type Smart Door Lock Set
Brand Aqara
Model U400 (with Hub M100)
Communication Protocols Matter over Thread / Zigbee / Bluetooth
Body Material Aluminum alloy body, matte PMMA panel
Waterproof Rating IP65 (Outer panel)
Security Standard US BHMA security standard
Battery Capacity 4880mAh lithium battery
Unlock Methods UWB hands-free, fingerprint, passcode, NFC card, Apple Home Key, mobile app, physical key
Supported Platforms Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, Aqara Home

Product Highlights

  • ✓ UWB precision positioning technology unlocks automatically upon approach, combining dynamic encryption with nanosecond-level time-of-flight ranging to verify identity and distance, effectively preventing relay attacks (Requires a UWB-enabled iPhone, iPhone 11 series or later).
  • ✓ Adjustable UWB approach direction (Left/Center/Right), triggers sensing only when approaching from the specified direction, effectively avoiding accidental triggers.
  • ✓ Supports Dual-Door Mode, suitable for dual-door environments to improve UWB recognition efficiency and unlocking accuracy.
  • ✓ Supports multiple unlocking methods, including fingerprint, anti-peep passcode, one-time passcode, periodic passcode, NFC card, Apple Home Key, mobile app, remote real-time unlocking, and Samsung Wallet digital keys (scheduled for Q1 2026).
  • ✓ Features AES encryption and local fingerprint module encryption, with unlocking in as fast as 0.3 seconds, ensuring personal data and access security.
  • ✓ Privacy lock mode (only administrators and physical keys can unlock).
  • ✓ Unlocking can trigger scene automations, automatic locking upon closing, and support for silent mode.
  • ✓ Outer panel features an IP65 waterproof rating, compliant with US BHMA standards.
  • ✓ Built-in 4880mAh lithium battery with approximately 6 months of battery life.
  • ✓ Aluminum alloy body structure with a matte PMMA panel design.
  • ✓ Remote monitoring of lock status and battery level.
  • ✓ Supports Matter over Thread, Apple Home, Google Home, Amazon Alexa, and Samsung SmartThings.

FAQs

What are the device requirements for UWB hands-free automatic unlocking?

UWB hands-free unlocking requires a UWB-enabled iPhone (iPhone 11 series or later) and an Apple device that supports Thread technology (e.g., HomePod mini, HomePod 2nd generation, or Apple TV 4K).
What unlocking methods does this smart door lock support?

It supports UWB precision positioning automatic unlocking, fingerprint, anti-peep passcode, one-time passcode, periodic passcode, NFC card, Apple Home Key, mobile app remote unlocking, and physical keys.
Is the door lock waterproof?

The outer panel of the door lock has an IP65 waterproof rating and meets US BHMA security standards, making it suitable for installation in various environments.
Does the product include installation service?

This product does not include installation service. To arrange an installation assessment, please provide photos of your existing door lock and the front and sides of your door so that we can evaluate the installation requirements.