The Ajax DoorBell Black is a smart 4 MP video doorbell with a wide 155° HDR camera, AI object recognition, a built-in PIR sensor and two-way audio. Connecting over Wi-Fi with Jeweller and Wings fallback when paired with an Ajax hub, it lets you see, hear and speak to visitors from the Ajax app, with footage stored on Ajax NVR or in the cloud.
Ajax DoorBell Black Smart 4MP Video Doorbell with AI
The Ajax DoorBell (model ADB.Y.W) is a smart video doorbell that combines a high-resolution HDR camera, a dedicated PIR motion sensor and two-way audio to give you complete awareness of who is at your door. When a visitor presses the button or motion is detected, you receive an instant notification and can see, hear and speak to them in real time through the Ajax app.
Designed for outdoor use with an IP54-rated housing, the DoorBell delivers clear video day and night and integrates with the wider Ajax ecosystem for recording and verification.
4 MP HDR Camera with Wide View
A 4 MP camera (up to 2688 × 1520) with a wide 155° horizontal field of view captures the entire doorstep — from a visitor's face to packages on the ground. HDR improves detail in scenes with both bright and dark areas, such as a sunlit doorway.
AI Recognition and PIR Motion Detection
A dedicated PIR sensor (120° horizontal, up to 4 m) detects approaching visitors, while on-board AI recognition distinguishes people, vehicles and pets to deliver relevant alerts and reduce false notifications. Detection sensitivity is adjustable across three levels.
Two-Way Audio
Built-in microphone and speaker provide two-way audio with always-active noise suppression and echo cancellation, so conversations with visitors are clear and natural — almost like a phone call — directly from the Ajax app.
Clear Night Vision
A smart infrared illuminator provides night vision up to 6 metres, automatically adjusting intensity to keep faces and detail visible in darkness without overexposure.
Wi-Fi with Ajax Fallback
The DoorBell connects primarily over Wi-Fi (2.4 GHz 802.11 b/g/n). When added to an Ajax hub, it can use the Jeweller and Wings protocols as backup communication channels, helping keep the doorbell operational even if Wi-Fi is temporarily unavailable.
Weatherproof Design with Battery Backup
Rated IP54 and operating from −25°C to +60°C, the DoorBell withstands outdoor conditions. A built-in rechargeable battery provides short-term backup during power interruptions and heats the device in cold climates to protect performance and battery life.
Flexible Storage
Footage can be stored on Ajax NVR or in Ajax Cloud Storage, allowing you to review recordings whenever needed from the Ajax app.
KEY BENEFITS
- See, hear and speak to visitors from the Ajax app
- 4 MP HDR camera with wide 155° field of view
- AI recognition of people, vehicles and pets
- Dedicated PIR sensor for reliable motion alerts
- Clear two-way audio with noise and echo cancellation
- Infrared night vision up to 6 m
- Wi-Fi with Jeweller and Wings fallback via Ajax hub
- Weatherproof IP54 housing for outdoor use
- Battery backup and cold-climate self-heating
- Footage stored on Ajax NVR or cloud
- Available in Black finish
- Ideal for homes and businesses
KEY FEATURES
- Smart video doorbell with AI
- 4 MP CMOS camera, up to 2688 × 1520
- 155° horizontal / 90° vertical field of view
- HDR imaging
- Infrared night vision up to 6 m
- PIR sensor 120° H, up to 4 m, 3 sensitivity levels
- AI detection: people, vehicles, pets
- Two-way audio (G722) with noise/echo cancellation
- Wi-Fi 802.11 b/g/n 2.4 GHz
- Jeweller and Wings fallback with Ajax hub
- Power 12–24 V⎓ or 16–24 V~
- Built-in Li-ion backup battery (600 mAh)
- IP54 protection rating
- Operating temperature −25°C to +60°C
- Dimensions 145 × 47 × 34 mm
- JetSparrow encrypted video
- NVR and Ajax Cloud storage
- Multiple colour options
- Indoor and outdoor use
IDEAL FOR
- Front doors and entrances
- Homes and apartments
- Offices and commercial premises
- Retail and reception entrances
- Monitoring deliveries and visitors
- Remote visitor communication
- Ajax video and security systems
NETWORK & AJAX INTEGRATION
- Connects primarily via Wi-Fi (2.4 GHz)
- Jeweller and Wings fallback when paired with an Ajax hub
- Compatible with Ajax Hub, Hub Plus, Hub 2 (2G/4G), Hub 2 Plus, Hub Hybrid (2G/4G)
- Footage stored on Ajax NVR or Ajax Cloud Storage
- Managed via Ajax mobile applications (iOS and Android)
- Managed via Ajax desktop applications (Windows and macOS)
- Encrypted JetSparrow video protocol
- Two-way audio through the Ajax app
- Supports Ajax Cloud remote access
- Supports Over-the-Air (OTA) firmware updates
| Specification |
Details |
| Brand |
Ajax |
| Model |
DoorBell |
| Article Number |
66391.125.BL1 |
| Device Model Code |
ADB.Y.W |
| Product Type |
Smart Video Doorbell |
| Camera |
4 MP CMOS |
| Max Resolution |
2688 × 1520 |
| Field of View |
155° H / 90° V |
| HDR |
Yes |
| Night Vision |
Infrared up to 6 m |
| PIR Sensor |
120° H, up to 4 m, 3 sensitivity levels |
| AI Detection |
People, Vehicles, Pets |
| Audio |
Two-way (G722), noise & echo cancellation |
| Wi-Fi |
802.11 b/g/n, 2.4 GHz |
| Fallback Communication |
Jeweller + Wings (with Ajax hub) |
| Power Supply |
12–24 V⎓ or 16–24 V~, 50/60 Hz |
| Power Consumption |
10 W |
| Backup Battery |
Li-ion 600 mAh (short-term + self-heating) |
| Protection Rating |
IP54 |
| Operating Temperature |
−25°C to +60°C |
| Operating Humidity |
Up to 90% |
| Dimensions |
145 × 47 × 34 mm |
| Weight |
163 g |
| Storage |
Ajax NVR / Ajax Cloud |
| Colour |
Black |
| Indoor / Outdoor |
Indoor and Outdoor Use |
| Warranty |
24 Months |
FREQUENTLY ASKED QUESTIONS (FAQs)
What is the Ajax DoorBell used for?
It is a smart video doorbell that lets you see, hear and speak to visitors from the Ajax app. It combines a 4 MP HDR camera, a PIR motion sensor, AI recognition and two-way audio, with footage stored on Ajax NVR or in the cloud.
How does it connect?
The DoorBell connects primarily over Wi-Fi (2.4 GHz). When added to an Ajax hub, it can use the Jeweller and Wings protocols as backup channels to stay operational if Wi-Fi is temporarily unavailable.
Does it need an Ajax hub?
No — it works over Wi-Fi with the Ajax app. However, pairing it with an Ajax hub adds Jeweller/Wings fallback communication and tighter integration with the wider Ajax system.
What can the AI detect?
The built-in AI recognises people, vehicles and pets, and a dedicated PIR sensor detects motion up to 4 m, so you receive relevant alerts with fewer false notifications.
Can it see at night?
Yes. A smart infrared illuminator provides night vision up to 6 m, automatically adjusting intensity to keep detail visible in darkness.
Is it weatherproof?
Yes. It carries an IP54 rating and operates from −25°C to +60°C, and includes a self-heating battery for cold climates, making it suitable for outdoor installation.
Where is footage stored?
Recordings can be stored on Ajax NVR or in Ajax Cloud Storage and reviewed at any time from the Ajax app.
What colours are available?
This product (article 66391.125.BL1) is the Black version. It is also available in White, Grey and Graphite under separate article numbers.
