Aqara G400 Doorbell Camera: Wired 2K Video with HomeKit Secure Video

The Aqara G400 is a wired doorbell camera built for real security. It records in 2K video and shows visitors from head to toe. The body is rated IP65, so it works in rain, heat, or cold. Power comes from PoE or low-voltage wires. You never have to swap batteries. The G400 uses HomeKit Secure Video to keep your clips private.

Announced at IFA 2025, the Aqara G400 brings premium wired doorbell features to the Apple HomeKit ecosystem. The wired power design eliminates battery management concerns, providing consistent 24/7 monitoring. The 2K resolution and 165-degree vertical field of view ensure complete visitor identification from head to toe, surpassing typical doorbell cameras that cut off at chest height. With on-device AI detection and optional cloud-based face recognition, the G400 delivers accurate alerts while maintaining privacy through HomeKit Secure Video's end-to-end encryption.

Specifications

Spec	Detail
Video resolution	2K (2560x1440)
Field of view	165 degrees vertical (head to toe)
Power options	PoE (802.3af) or 8-24V AC/DC low-voltage
Weather rating	IP65 (dust-tight, rain-resistant)
AI detection	On-device: people, packages, vehicles, animals
Cloud AI	Optional face recognition via Aqara account
Smart platforms	Apple HomeKit Secure Video, Alexa, Google Home, SmartThings, Home Assistant (RTSP)
Storage	Encrypted iCloud (HomeKit), local NAS via RTSP
Operating temp	-20 to 50 degrees C
Night vision	Color night vision

Unique Features of the Aqara Doorbell Camera G400

The Aqara G400 has some standout features that set it apart:

• It runs on PoE or low-voltage wiring, so it's always on.
• The 2K sensor gives you sharp, clear video at your door.
• A 165-degree vertical view shows the full height of every visitor.
• It's rated IP65, so it handles all kinds of weather.
• It detects people on the device, so you get fewer false alerts.
• Optional cloud AI spots faces, packages, cars, and animals.
• HomeKit Secure Video keeps all your clips end-to-end encrypted.
• It works with Apple Home, Alexa, Google Home, and SmartThings. It also supports RTSP for Home Assistant.

The G400 fills a real gap in the Apple HomeKit camera market. Most wired doorbells that support HomeKit Secure Video are limited to 1080p or lack a proper outdoor rating. The G400 addresses both issues with 2K resolution and true IP65 protection that handles rain, dust, and temperatures from -20 to 50 degrees C.

Clear Video and Smart Alerts

The 2K video on the G400 is sharper than most doorbells. You can see faces, packages, and plates with ease. The 165-degree view goes from head to toe. Most doorbells cut off at chest height, so this is a meaningful improvement when you need to confirm visitor identity.

The G400 uses on-device AI to detect people, packages, vehicles, and animals. This cuts false alerts from tree branches, passing cars, and dogs. You can also add Aqara's cloud AI for more detail. The cloud tier adds face recognition for specific people. Your HomeKit clips are encrypted at all times. Neither Aqara nor Apple can view your recordings.

Color night vision adds another layer of security after dark. Standard infrared night vision shows a grey image. Clothing colors and vehicle colors are lost. Color night vision keeps hues when ambient light is present. This gives you more context for each alert. When light drops low, the camera switches to infrared on its own.

Apple HomeKit Works Smoothly

The G400 has full support for Apple HomeKit Secure Video. If you use Apple, you'll appreciate what this means in practice:

• All clips are end-to-end encrypted. Apple handles them in the Home app.
• The Home app makes it easy to manage from your iPhone, iPad, or Mac.
• You can set motion zones, build automations, and watch live streams.
• It fits right into your Apple smart home setup with no extra bridge required.

HomeKit Secure Video stores up to 10 days of clips in iCloud. There is no extra charge with an iCloud+ plan at 50GB or higher. The encryption is end-to-end. Apple cannot view your footage. Clip triggers use motion zones you define in the Home app. This also reduces unnecessary storage use.

Easy Setup and Wide Support

The G400 is wired, so you don't have to worry about battery life. It works with PoE or old-style low-voltage wires. You can use a new ethernet cable or your existing doorbell wiring.

Installing over PoE means running a single Cat5e cable. It goes from your router or PoE switch to the doorbell. One cable carries both power and data. If you have low-voltage doorbell wiring at 8-24V AC/DC, the G400 works with that too. You will still need a network connection for the camera. PoE is the cleaner option when running new cable.

It works with Apple Home, Alexa, Google Home, and SmartThings. It also supports RTSP for Home Assistant. It's not a Zigbee hub. It's a top-quality doorbell that plays well with many platforms regardless of your primary smart home ecosystem.

How the G400 Compares to G4 and G410

Feature	G4	G400	G410
Resolution	1080p	2K	2K
Field of view	162 degrees	165 degrees	175 degrees
Power	Battery or wired	PoE or low-voltage	Wired
Weather rating	IP65	IP65	IPX3
Hub function	No	No	Matter, Thread, Zigbee
Best for	No cable access	Reliable outdoor use	Covered porch + hub

G400 vs G4: Choose the G400 if you can run a PoE cable and want 2K video. The G4 is the right pick if you need battery flexibility or already have standard doorbell wiring but don't want to upgrade.

G400 vs G410: The G400 wins outdoors - IP65 vs IPX3 is a meaningful difference in heavy rain. The G410 makes sense if you also need a Matter/Thread/Zigbee hub at your door and it will be under a covered porch.

Why Choose the G400?

Here's why the Aqara G400 stands out from other doorbells:

• Wired power means it's always on. No dead batteries.
• 2K video shows every visitor in sharp detail.
• AI detects people on the device, so alerts are accurate.
• IP65 rating means it handles heat, rain, and cold with ease.
• HomeKit Secure Video keeps your clips private and encrypted.
• It works with Apple, Alexa, Google Home, SmartThings, and Home Assistant.
• You can store clips on-device or in encrypted cloud backup.

Getting Started with the G400

Setup is straightforward:

1. Pick your power: PoE or low-voltage wires.
2. Mount the doorbell at door height with a clear forward view.
3. Connect it to your network. PoE is best since it carries power and data in one cable.
4. Add it to the Apple Home app, Alexa, Google Home, or SmartThings.
5. Set your motion zones and AI detection preferences.
6. Watch live or receive alerts from anywhere on your phone.

The G400 is a strong pick for Apple users who want a wired doorbell they can trust. You get sharp 2K video, IP65 rain and dust protection, and HomeKit clips that stay encrypted. Setup takes under fifteen minutes with PoE. Once it is in place, it just runs. No battery swaps. No dead cameras at your door. The Aqara app lets you pick which alerts you want. Turn on person, face, or package alerts. Turn off the ones you don't need. You stay informed without the noise.

The main competition includes the Ring Video Doorbell Pro and Nest Doorbell Wired. Neither matches the G400 for HomeKit Secure Video. Ring needs a subscription for AI person and package alerts. The G400 includes on-device AI at no ongoing cost. The Nest Doorbell works well with Google Home but does not support Apple HomeKit. For Apple users who want a wired doorbell with real 2K clarity, the Aqara G400 is a strong choice.