
HomeSiren U Jeweller
Wireless siren with an LED connector
Product is not available in your region
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.
In an Ajax system, you can combine devices of all product categories: Intrusion protection (both Superior and Baseline), Video surveillance, Fire and life safety, or Comfort and automation. Create the system to suit your needs and manage it in a single interface.
Alarm and event alerts for any facility type
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


Jeweller
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
Communication through steel and concrete
Some facilities have thick walls, metal partitions, or sheer distances that affect signal quality. Ajax range extenders are designed to increase the range of a wireless network and deliver stable connection with a hub despite the obstacles. And by choosing the model with an Ethernet cable connector, you get an additional communication channel. А single system can accommodate up to five range extenders.
Up to 5 range extenders within one system
Ethernet-equipped model available




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






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.
Pairing with the hub via the QR code

SmartBracket mounting panel — no need to disassemble the enclosure for installation

Configuring and testing in mobile and desktop apps

PRO Desktop app for macOS and Windows

In an open space.
Requires additional installation of an opening detector.
From 3 seconds to 3 minutes.
Technical information
More Ajax siren models
Ajax product categories
In an Ajax system, you can combine devices of all product categories: Intrusion protection (both Superior and Baseline), Video surveillance, Fire and life safety, or Comfort and automation. Create the system to suit your needs and manage it in a single interface.