Overview Summary
The Ajax Security Outdoor 4MP WiFi Video Doorbell offers clear video, smart AI detection and reliable two-way audio to secure your entrance with ease. Designed for homes and businesses in South Africa, it provides strong night vision, fast connectivity and dependable performance in all weather. With motion alerts, secure communication and seamless integration into Ajax systems, it's a powerful upgrade for any property. Shop now and enjoy clearer visibility and smarter control of your front door.
Its extended WiFi range, backup battery and durable IP54 build ensure consistent monitoring even during power or network disruptions. With easy installation and intuitive app control, this doorbell helps you protect your home or office effortlessly. Buy now and enjoy advanced monitoring with instant access to live video and alerts.
Performance tier: Advanced
Uses: Home entry monitoring, office access control, apartment security, visitor verification, outdoor surveillance Overview
Ajax Security Outdoor Black 4MP WiFi Video Doorbell
The Ajax 66391.125.BL1 is a high-quality 4MP video doorbell designed to enhance security and communication at your doorstep. Featuring built-in AI for object recognition and precise motion detection, it ensures a reliable and clear view of your front entrance, whether you're at home or away. Key features: Built-in AI Object Recognition: Detects and recognises people, animals, and vehicles with high accuracy. Clear Two-Way Audio: With noise suppression and echo cancellation for crisp conversations. Motion Detection: Equipped with a PIR sensor for precise detection and adjustable sensitivity. Enhanced IR Illumination: Provides clear video feed at night, with up to 6m (20 ft) range. Chime Functionality: Integrates with Ajax sirens to notify you of visitors or intrusions. Wide HDR Camera: Offers excellent video quality, even in challenging lighting conditions. IP65 Weatherproof: Designed to withstand outdoor conditions, ensuring durability and reliability. Enhanced Wi-Fi Connectivity: Operates at distances of up to 500m (1,600 ft) in line of sight for seamless performance. Instant Access to Live Stream: View your doorstep in real-time and navigate smoothly through archives.
Manufacturer SKU: 66391.125.BL1
Description
This advanced WiFi video doorbell provides sharp 4MP video, dependable AI-driven detection, and two-way audio to enhance front-door awareness. Its PIR sensor, HDR camera and extended Wi-Fi range deliver consistent monitoring day or night, while backup battery power and secure connectivity ensure operation during outages or network issues. Designed for homes and businesses, it integrates seamlessly with Ajax systems for streamlined control and reliable incident verification.
Features
Device Compatibility
- EN54 Fire Hub Jeweller
- Hub 2 (2G) Jeweller
- Hub 2 (4G) Jeweller
- Hub 2 Plus Jeweller
- Hub BP Jeweller
- Hub BP Jeweller (without casing)
- Superior Hub Hybrid (4G)
- Superior Hub Hybrid (4G) (without casing)
- Superior Hub Hybrid 2
- Superior Hub Hybrid 2 (without casing)
- Superior MegaHub
- Superior MegaHub (without casing)
- EN54 Fire ReX Jeweller
- ReX 2 Jeweller
- Superior ReX G3 Jeweller
Security and Door Monitoring Highlights
DoorBell blends high-end surveillance with simple visitor interaction. Real-time communication eliminates delays when answering the door, and AI-powered recognition helps identify activity with accuracy. The wide HDR camera maintains clarity in bright or dark environments, making it reliable for any entrance.
Core Camera and Detection Capabilities
- 155 degree viewing angle
- 4 MP resolution
- HDR imaging
- IR illumination up to 6 m
- Built-in AI recognition
- PIR-based motion detection with adjustable sensitivity
- Two-way audio with noise suppression and echo control
Colour Variants and Interaction
- Multiple colour options
- Mechanical push button with LED status
- Chime compatibility with Ajax sirens or third-party devices
Real-Time Alerts and Monitoring
Push alerts instantly report button presses or detected motion. Access to live video and archives provides fast verification, while the customizable virtual video wall allows personalised viewing layouts.
Connectivity and Power Stability
DoorBell maintains performance through extended Wi-Fi reach up to 500 m line of sight. A fallback communication channel activates when used with an Ajax hub, ensuring continued operation even if Wi-Fi fails. AC/DC power support combines with a built-in backup battery capable of powering the unit for up to an hour during outages.
Durability and System Integration
The enclosure is built to resist dust and water, and the device includes a tamper mechanism for dismantling detection. It works seamlessly with intrusion, fire, video and automation devices within the Ajax ecosystem, managed through one unified interface.
Everyday Applications
- Homes
- Offices
- Apartments
- Townhouses
Streamlined User Experience
JetSparrow technology ensures minimal delay when watching live video or browsing the archive. HDR image quality and stable audio contribute to a smooth, phone-like interaction with visitors.
Intelligent Recognition and Motion Accuracy
AI analysis distinguishes between people, animals and vehicles. PIR detection further refines event accuracy, and custom zone settings reduce unnecessary notifications.
Resilient Operation in Any Condition
The device continues functioning during power loss thanks to its internal battery. Automatic heating in low temperatures reduces battery wear and maintains reliable operation.
Video Storage Options
- Ajax NVR
- Ajax Cloud Storage
Local NVR Advantages
The Ajax NVR supports local storage up to 16 TB, fast access to recordings and compatibility with third-party IP cameras. It works as a central part of an integrated security and automation system.
Secure, Future-Ready Hardware Design
- Camera: 4 MP CMOS, 2688 x 1520, HDR
- Motion: PIR sensor with optical filter
- Power: 12 to 24 V DC or 16 to 24 V AC
- Protection: IP54 enclosure
- Sabotage: Anti-tamper alarm
- Angles: 155 degree horizontal, 90 degree vertical
- Speaker: up to 85 dB
- Battery: includes automatic heating
- LED: status indicator
- Wedge brackets included for flexible mounting
Data Security and Compliance Standards
All information is stored within the EU under strict data protection guidelines. DoorBell is NDAA-compliant, uses trusted component suppliers, and has passed independent cybersecurity assessments.
Encrypted video and transmission reliability
JetSparrow ensures fast archive navigation, zero-delay live view and TLS-encrypted peer-to-peer communication.
Extended Wireless Performance
The device is designed to minimise impact from interference and maintain video transmission without freezing. With a Wi-Fi range of up to 500 m line of sight, installation locations are far more flexible.
Verified Video Exports
Recordings include a digital signature to prevent tampering. Ajax Media Player validates authenticity automatically.
Advanced Account and Cloud Security
Continuous system hardening includes brute-force protection, multi-factor login, session controls and restricted access to sensitive video.
Passwordless Authentication
DoorBell connects to only one space using mTLS, removing password-related risks and simplifying setup.
- Mutual TLS
- No password vulnerabilities
- Secure installation workflow
Third-Party Integration Options
The device supports ONVIF and RTSP, enabling smooth connection to external VMS or existing camera networks. Setup is simplified through an auto-detection wizard.
Compatible with:
- ONVIF Profile S
- ONVIF Profile T
- ONVIF Profile MCodec: H.264Roles: Administrator, Operator, UserExtras: motion events and AI recognition
Specifications
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Specifications |
| Product Code | AJAX-DB-B |
| Video stream |
| Camera | 4 MP CMOS sensor |
| Resolution | up to 2688 x 1520 px |
| Camera viewing angles | horizontal: 155degrees |
| vertical: 90degrees |
| Video protocol | JetSparrow |
| Fast and encrypted peer-to-peer video protocol developed by Ajax Systems. |
| Storage options | NVR |
| Ajax Cloud Storage |
| Video codec | H.264 |
| Dynamic range | HDR |
| Improves the accuracy of detail in bright and dark scenes. |
| Communication channel |
| Wi-Fi | 802.11 b/g/n module |
| 2.4 GHz, up to 2 Mbit/s. |
| Jeweller and Wings communication technologies |
| Proprietary wireless communication technologies to transmit commands, alarms, events, and photo verifications. They serve as a backup communication channel when the device is added to the hub. |
| Key features |
| Two-way communication | Clear and loud voice communication between users and visitors near the device. |
| Motion detection | The device detects movement using a built-in PIR sensor and software image frame analysis. |
| Object detection | using AI |
| People. |
| Pets. |
| Vehicles. |
| Smart IR illumination | up to 6 m |
| Automatic adjustment of intensity in real time to avoid overexposure. This allows you to see objects that are far away or too close to the camera in low-light conditions. |
| Visual verification of Ajax alarms | The system allows you to set up a scenario when Ajax detectors activate selected cameras to start recording. The result is immediately sent to the mobile or desktop monitoring app. |
| Support for ONVIF authorization | Profile S |
| Profile T (partially) |
| Ajax cameras and NVRs can be integrated into third-party video management systems (VMS). |
| Microphone | For two-way communication and sound recording at the site. |
| Audio codec | G722 |
| Audio processing | Always active noise suppression and echo cancellation. |
| PIR detection |
| Sensitive elements | 1 x PIR sensor |
| Motion detection distance | up to 4 m |
| Depends on the sensitivity level adjusted in the device settings. |
| Motion detection angle | horizontal: 120degrees |
| vertical: 100degrees |
| Sensitivity | 3 levels |
| Adjusted by a PRO or a user with admin rights in Ajax apps. |
| Installation recommendations |
| Installation recommendations | It is recommended to install the device at a height of 1.2-1.5 m. |
| The device is designed for outdoor and indoor use. |
| It is not recommended to install the device in direct sunlight. This may cause overheating and damage to the device's electrical components. |
| Tamper alarm |
| Tamper alarm | Notifications of attempts to remove the device from the mounting panel. |
| Holding screw | secures the device on SmartBracket |
| mTLS | Encrypted connection for data protection. |
| Authentication | via Ajax Cloud |
| Without local access rights. |
| Secure Boot | Protection against firmware spoofing. |
| OTA signature verification | Secure automatic firmware update. |
| Privacy | Access rights distribution for users in mobile apps and for monitoring operators in PRO Desktop. |
| Communication loss detection | Wi-Fi: can be set from 30 s |
| Jeweller/Wings: after 36 s |
| Detection time depends on Ajax Cloud connection and Jeweller or Jeweller/Fibra settings. |
| Power supply |
| Power supply | Device power consumption |
| 10 W |
| Main DC voltage range |
| 12-24 V? |
| Main AC voltage range |
| 16-24 V~, 50/60 Hz |
| Minimum current |
| wired chime is not connected: |
| 1 A for 12 V? |
| 0.5 A for 24 V? |
| 0.6 A for 16 V~ |
| 0.4 A for 24 V~ |
| wired chime is connected: |
| 3 A for 12 V? |
| 3 A for 24 V? |
| 0.6 A for 16 V~ |
| 0.4 A for 24 V~ |
| Battery |
| built-in rechargeable battery: Li-ion 600 m?h |
| Intended to heat the device in a cold climate and provide a backup power supply for short periods. |
| Power supply recommendations |
| Power supply recommendations | When DoorBell is connected to a wired chime using BellKit, a more powerful power supply is required to ensure stable device operation: |
| DC: 12-24 V, 3 A or more |
| AC: 16-24 V, 10 VA or more. |
| Enclosure |
| Dimensions | 145 x 47 x 34 mm |
| Weight | 163 g |
| Operating temperature range | from -25 degreesC to +60 degreesC |
| Operating humidity | up to 90% |
| Protection class | IP54 |
| Color |
| Color | White |
| RAL 9003 |
| Grey |
| RAL 7004 |
| Graphite |
| RAL 7024 |
| Black |
| RAL 9005 |
| Complete set |
| Complete set | DoorBell |
| SmartBracket mounting panel |
| Wedge bracket (2 pcs) |
| BellKit (for connection to a wired chime) |
| Installation kit |
| Quick start guide |
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