Aqara G400 Doorbell Camera: 2K Wired Video with HomeKit

Want a HomeKit doorbell that films sharper than 1080p and never needs a battery charge? The Aqara G400 is a wired camera aimed right at that gap. It shoots 2K video and frames visitors head to toe, not just chest up, and the IP65-rated body shrugs off rain, heat, and cold. Power runs over PoE or existing 8-24V low-voltage doorbell wires, so batteries never enter the picture. Every clip stays private behind HomeKit Secure Video.

Aqara showed the G400 at IFA 2025 and put it on sale on 17 March 2026 at $99.99 in the US (model DB-C03E; a retail-channel G400 Select is DB-C03D), with Amazon listings dipping to about $85 by autumn. Europe pays 99.99 euros, and Australia got it in May 2026 at AUD 199. It lands genuinely premium wired features in the Apple HomeKit camera space. Wired power means no battery to babysit and steady 24/7 recording. That 165-degree field of view in a tall 3:4 frame is the headline. It catches a visitor from head to toe, where most doorbell cameras stop around chest height. On-device AI handles motion, person and zone detection, the optional HomeGuardian cloud tier adds face, package, vehicle and animal recognition, and HomeKit Secure Video keeps the footage end-to-end encrypted the whole way.

Specifications

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 view in a tall 3:4 frame 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 local processing to detect motion and people, and to tell whether someone crossed into a zone you drew, directly on the device. That part keeps running when your internet is down. Package, vehicle and animal recognition, plus face recognition for specific-person alerts, live in Aqara's paid HomeGuardian cloud tier, so the "no subscription" version of this doorbell is a person detector with zones, which is still what cuts most false alerts from tree branches, passing cars, and dogs. Your HomeKit Secure Video clips are encrypted at all times. Neither Aqara nor Apple can view your recordings.

Night vision is infrared only, through 940nm LEDs that don't glow red the way cheaper 850nm ones do. That means a black and white picture after dark, so clothing colors and vehicle colors are lost unless your porch light is on. Earlier versions of this page said color night vision; Aqara's spec sheet doesn't list it, and the hands-on reviews confirm it isn't there. A porch light on a motion rule is the fix.

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. One limit Aqara states plainly: inside Apple Home the stream is capped at 1200p, so the full 2K frame is only on the microSD card and in the Aqara app.

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, over Wi-Fi 6 on either band. Aqara's fine print wants a transformer of at least 12VA at 12V, 16V or 24V (18VA at 18V) and says 8V and 10V transformers aren't recommended, so check the one in your basement before buying. The included plug-in chime replaces your old mechanical one; the G400 can't ring an existing chime. PoE is the cleaner option when running new cable.

It works with Apple Home, Alexa, Google Home, and SmartThings. It also supports RTSP and ONVIF for Home Assistant and NVRs. It's not a Zigbee hub, and it's not a Matter device either; the Matter camera in Aqara's range is the Camera Hub G350. 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

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 is notable 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 Secure Video clips that stay encrypted with detection handled on the device. Setup over PoE is quick, since one cable carries power and data. 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 and zone alerts for free, add the HomeGuardian face, package and vehicle alerts if you pay for them. Turn off the rest. Here's the fair tradeoff to weigh before buying: on-device AI is free, but banking clips still leans on storage. HomeKit Secure Video needs an iCloud+ plan at 50GB or higher to hold cloud recordings, and going fully local means running RTSP into a NAS you configure yourself. Neither is a dealbreaker, though the no-subscription pitch only really holds if you keep recordings local.

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.