HomeSiren U Jeweller

Wireless siren with an LED connector

When loud is the best defence

HomeSiren U Jeweller is a version of Ajax’s well known siren, refined to meet the strict UK standards. It is more than just a noise-making device. This compact device alerts users when a door is opened and displays delays when entering/leaving, as well as after-alarm notifications. Additionally, the siren can serve as a security status indicator. The device operates on pre-installed batteries that promise up to 5 years of life. The Jeweller wireless protocol ensures reliable communication between the siren and a hub or range extender at distances1 of up to 2,000 m. HomeSiren U Jeweller is fitted with both hardware and software protection to keep user setups tamper-proof. Controlling the device is refreshingly simple thanks to seamless integration with Ajax apps.

Key features

• Adjustable volume of alarms and notifications
• Adjustable alarm duration
• Built-in LED indicator 
• Possibility to connect a third-party LED indicator
• Chime feature
• Holding screw for reliable fastening and protection from quick dismantling
• After-alarm indication
• Up to 2,000 m of wireless communication range1 with an Ajax hub or range extender
• Jeweller radio communication
• Encryption
• Two colors
• Indication of security mode change and delays when entering/leaving
• Informative push notifications
• Up to 5 years of operation on pre-installed batteries
• Remote control and configuration
• Hassle-free installation

Discover future-proof hardware

• LED indicator
• Buzzer
• Connector for an external LED indicator
• Tamper button
• SmartBracket mounting panel
• Pre-installed batteries
• Jeweller antenna
• Ready-to-use fixing points
• Fixing point for a holding screw

One device, five missions

Informs of any alert
The siren serves as a deterrent to intruders and provides alerts for fire detection, water leaks, and other alarms. Installers can configure the siren to respond to alarms triggered by specific detectors or security groups, and customize its volume using an Ajax app.

Indicates delays
HomeSiren U Jeweller can be configured to signal a delay when entering or leaving. When activated, the sound signal and built-in or external LED indicators serve as a reminder for users to disarm the system.

Displays the security mode
The siren can notify users of security mode changes with both sound and an LED indicator. The latter can be set to remain on continuously, indicating that the system is armed to prevent unwanted tracking. Additionally, an external LED indicator can be installed to ensure clear visibility of the security system status.

Notifies of doors being opened
HomeSiren U Jeweller offers a unique Chime feature that plays a special sound when an opening detector is triggered, even when the system is disarmed. This is ideal for stores, as it immediately alerts staff to incoming customers.

Provides after-alarm indication
When after-alarm indication is activated, the built-in or external LED indicator displays both confirmed and unconfirmed alarms, as well as notifies of the lid being opened.

Reliable performance in extreme temperatures

HomeSiren U Jeweller is powered by high-quality batteries that undergo real-time testing during production, with each unit meticulously inspected by Ajax Systems to verify its performance characteristics. These batteries maintain stable operation in temperatures ranging from -10 °C to +40 °C, ensuring consistent performance without any loss of capacity.

• Minimal impact of temperature extremes on battery life
• Proven high quality through regular testing
• Up to 5 years of autonomous operation

Unique wireless technology

Jeweller is Ajax’s proprietary radio protocol for secure two-way communication. It provides a block encryption and device authentication during each communication session with Ajax hub or radio signal range extender. Jeweller prevents sabotage, spoofing, and data theft.

• Up to 2,000 m of communication range in an open space
• Data encryption
• Notification of jamming and connection loss
• Automatic power adjustment

System supervision

All Ajax devices perform automatic self-diagnosis and report their states to the hub. Essential parameters, such as tamper, communication, and power supply statuses, are continuously monitored. The Ajax Cloud server controls communication between the hub and Ajax apps, ensuring instant notifications for monitoring companies and users. In case of any malfunction or connection failure, an installation engineer is informed immediately to provide necessary services.

• Automatic device self-diagnosis with status report
• Regular polling to display the current device state in apps
• Instant maintenance notifications

Sabotage resistance

Tamper alarm
A tamper is designed to detect malicious dismantling of HomeSiren U Jeweller. Users and CMS will be immediately notified of this. Other sirens in the system may also activate a sound signal if they are set up accordingly.

Data encryption
Block encryption with a dynamic key protects all the stored and transmitted system data. It makes device reprogramming extremely difficult and protects data from replacement and theft.

Data-rich notifications
The Ajax system instantly delivers informative notifications of alarms and events. Security companies and users receive precise details about an incident, including a triggered device, time, and location.

Device authentication against spoofing
The hub authenticates the device during each communication session by checking its unique parameters. If any parameter fails the check, the hub ignores device commands.

Regular polling
The device regularly exchanges data with the hub. The system controls each device state and reports any malfunction and connection loss.

Connection loss detection
At minimal polling interval settings (3 data packages every 12 seconds), it takes only 36 seconds to detect connection loss and notify the security company and users of the incident.

Effortless installation and setup

HomeSiren U Jeweller is ready to operate straight out of the box. Using the SmartBracket mounting panel, an installer can effortlessly mount the device on the wall, eliminating the need to disassemble the enclosure. Ajax apps facilitate quick integration into the ecosystem: simply pair the device with the hub by scanning the QR code. It can always be reconfigured remotely without the need for on-site visits.