MAKE IT YOURS
HomeSiren U.
Wireless siren with an LED connector
Standards and certifications
HomeSiren U Jeweller · HS.S.J-000-EU. Manufacturer-listed marks; regional and installation conditions apply.
An indoor alarm with clear feedback.
HomeSiren U Jeweller combines an indoor sounder with configurable LED and event indication. This version offers sound levels up to 105 dB at 1 m and a holding screw for secure mounting. Use it for alarms, security-mode feedback and a configured door-opening chime within the same Ajax system.
Key features. At a glance.
Adjustable volume of alarms and notifications
Adjustable alarm duration1
Built-in LED indicator
Possibility to connect a third-party LED indicator
Chime feature2
Holding screw
for reliable fastening and protection from quick dismantling
After-alarm indication
Up to 2,000 m3
of wireless communication range with an Ajax hub or range extender
Power adjustment
Two colors
Indication of security mode change and delays when entering/leaving
Informative push notifications
Up to 5 years4
of operation on pre-installed batteries
Remote control and configuration
Hassle-free installation
- 1From 3 seconds to 3 minutes.
- 2Requires additional installation of an opening detector.
- 3In an open space. Range is measured in open space; walls and installation conditions reduce it.
- 4Battery life depends on alarm use, notifications, temperature and radio conditions.
Ajax product information ↗ · HomeSiren U Jeweller specifications ↗
Protection in real places.
HomeSiren U Jeweller
Every detail has a purpose.
Explore the function, installation and system requirements of HomeSiren U Jeweller.
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An alarm that can be heard indoors.
Set the right alarm level
Choose 81, 93 or 105 dB at 1 m for HomeSiren U. Configure which detector events should activate it, so the sound matches the intended alarm response.
The normal alarm duration is 3 seconds to 3 minutes. Do not apply the different HomeSiren volume specification to this U model.
Useful feedback between alarms.
Entry and exit delays
Optional beeps make a configured entry or exit delay audible, helping people understand when they need to disarm or leave.
See that an alarm happened.
After-alarm indication
When enabled, the LED continues to indicate a past alarm until the system is disarmed. An optional wired LED can mirror the built-in indicator.
Check the configured indication before entering; the LED does not explain the cause of an alarm. Review the event feed in the Ajax app.
Battery power without a supply cable.
Two replaceable CR123A batteries
Preinstalled batteries provide up to five years under the stated use conditions. The app reports battery status so replacement can be planned.
For indoor use only: −10°C to +40°C, IP50, IK06. Mount at least 2.5 m high where practical, following the manual. The LED connector does not power the siren.
A secure link to your system.
Jeweller communication
Encrypted two-way communication carries commands, alarms and device status between the device and its compatible Ajax hub or assigned range extender.
Up to 2,000 m in open space. Walls, metal and other obstacles reduce usable coverage. Check signal strength at the installation position and use equipment for the same radio-frequency region.
Reach another part of the building.
Use a compatible range extender
An assigned range extender can connect the siren in an area where the direct hub link is weak. Check the path to the extender and from the extender to the hub.
A range extender increases coverage, not the hub’s device limit. Select the model and placement for the actual site.
Protection that also watches itself.
Removal alerts
The tamper reports attempts to detach the siren from its mount or surface. Secure the mounting points and holding screw before testing.
Connection and device status
Regular communication lets the hub identify a lost connection or device fault. Notifications name the affected device and room.
Detection time depends on the polling settings. The siren does not connect independently to a monitoring station.
Authenticated messages
Device authentication and encryption help prevent an unregistered device from imitating the siren or its commands.
Set up for the way the site works.
Connect
Scan the device QR code in the Ajax app, then assign a recognisable name and room. Check compatibility with the hub and any range extender before installation.
Find the right siren.
Compare indoor and outdoor sirens across Baseline, Superior and Fibra. See how sound, light, power and everyday notifications fit the place you want to protect.
Compare sirens →Every detail, in one place.
Communication
- Jeweller communication technology
- Two-way system communication for the functions specified for this model.
- Radio signal range
- up to 2,000 m Between siren and control panel (or range extender) in an open space.
- Encrypted communication
- Encrypted device communication.
- Frequency hopping
- Radio communication uses frequency hopping to prevent interception and jamming.
Key features
- Alarm type
- acoustic and LED Buzzer and LED.
- Type of warning device
- type W Internal, self-powered.
- Alarm volume
- from 81 to 105 dB at a distance of 1 m Adjusted by PRO or user with admin rights in the Ajax app.
- Alarm duration
- from 3 s to 3 min Adjusted by PRO or user with admin rights in the Ajax app.
- Siren sound frequency
- 3.4 ± 0.5 kHz
- Ability to connect an additional LED
- 3 V⎓ An additional LED works in parallel with the built-in LED of the siren and fully replicates its indication.
- Events indication
- Alarms.; Delays when entering/leaving.; Security mode.; Security mode changing. ; After-alarm indication.
Sabotage protection
- Tamper alarm
- Notifications on attempts to detach the siren from the surface or remove it from the mounting panel.
- Holding screw
- to secure the siren on SmartBracket
- Protection against spoofing
- device authentication
- Communication loss detection
- after 36 s Detection time depends on the Jeweller or Jeweller/Fibra settings.
Power supply
- Batteries
- 2 × CR123A 3 V⎓ Lithium battery Pre-installed.
- Calculated battery life
- up to 5 years
- Siren’s operating voltage range
- 1.9−3.3 V⎓
- Full capacity
- 3,200 mAh
Enclosure
- Dimensions
- 75 × 76 × 27 mm
- Weight of the black device
- 92 g
- Weight of the white device
- 94 g
- Operating temperature range
- from −10°C to +40°C
- Operating humidity
- up to 75%
- Protection class
- IP50, IK06
What’s in the box
- HomeSiren U Jeweller
- SmartBracket mounting panel with holding screw
- 2 CR123A batteries (pre-installed)
- Connector for LED indicator
- Installation kit
- Quick start guide
For your installation
- Confirm the supported control panel, device software and regional radio version; test coverage at the final installation position.
- The siren is designed for indoor use only. Recommended installation height is 2.5 m and higher.
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