Ajax HomeSiren U Jeweller Internal Sounder
Ajax
- Black or White
- 105 dB Capacity
- Warning LED's
he Ajax HomeSiren U is a wireless indoor sounder that loudly notifies of an alarm during detector activation, with capacity up to 105 dB & warning LED (Read more)
PRODUCT DETAILS
The Ajax HomeSiren U Jeweller is a compact and powerful indoor wireless siren designed to provide clear, instant alarm signalling within Ajax U-Jeweller security systems. Despite its small size, the HomeSiren U delivers a loud, configurable alert—making it ideal for homes, offices, retail units, and internal commercial spaces where reliable intrusion notification is essential.
Using Ajax’s advanced U-Jeweller wireless protocol, the siren maintains secure two-way communication with the hub at distances up to 1,700 m (line-of-sight). Its low power consumption ensures long battery life, while its adjustable sound level allows installers to tailor the device to the environment. A built-in LED indicator and optional external LED output give users clear visual confirmation of system states and alarms.
Features:
- Loud, configurable indoor siren – adjustable from 80 to 105 dB
- U-Jeweller wireless communication – long-range, secure transmission up to 1,700 m
- Fast alarm signalling – responds instantly to intrusion events
- LED indication – displays alarms, delays, and system statuses
- Optional wired LED terminal – supports connection of an external indicator
- Long battery life – efficient operation for years without replacement
- Compact design – blends discreetly into modern interiors
- Tamper protection – alerts if the enclosure is opened or removed
- Easy installation – secure SmartBracket mount with QR-code setup
- Compatible with Ajax hubs and range extenders using U-Jeweller
| Communication |
|
| Jeweller communication
technology |
Proprietary wireless communication
technology to transmit commands, alarms, and events. Key features: Two-way communication. Advanced anti-sabotage. Block encryption featuring a dynamic key. Instant notifications. Remote control and configuration in Ajax apps. |
| Frequency bands |
866.0–866.5 MHz 868.0–868.6 MHz 868.7–869.2 MHz 905.0–926.5 MHz 915.85–926.5 MHz 921.0–922.0 MHz |
| Maximum effective radiated power
(ERP) |
up to 25 mW |
| Radio signal modulation |
GFSK |
| Radio communication range |
up to 2,000 m |
| Encrypted communication |
All stored and transmitted data are
protected by block encryption featuring a dynamic key. |
| Frequency hopping |
To prevent radio interference and
jamming. |
| Key features |
|
| Alarm type |
acoustic and LED indication |
| Warning device type |
type W |
| Alarm volume |
from 80 to 100 dB at a distance of 1
m Adjusted by a PRO or a user with admin rights in the Ajax app. 93 dB at a distance of 1 m |
| Alarm duration |
from 3 s to 3 min Alarm duration up to 15 minutes is available only for sirens with firmware version NA 5.60.4.14 or higher. Adjusted by a PRO or a 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. |
| Chime |
The siren makes a special sound to
notify that the opening detectors are triggered when the system is
disarmed. |
| Recommendations |
The siren is designed for indoor use
only. Recommended installation height is 2.5 m or higher. |
| Sabotage
protection |
|
| Tamper alarm |
Notifications on attempts to detach the
device from the surface or remove it from the mounting
panel. |
| Protection against spoofing |
device authentication |
| Communication loss detection |
after 36 s |
| Power supply |
|
| Battery |
2 x CR123A |
| Calculated battery life |
up to 5 years |
| Siren’s operating voltage
range |
1.9−3.3 V⎓ |
| Siren’s nominal operating
voltage |
3 V⎓ |
| Quiescent siren’s current consumption
at nominal voltage |
68 µA |
| Peak siren’s current consumption at
nominal voltage |
1.1 A |
| Average siren’s current consumption at
nominal voltage |
50 mA |
| Full battery capacity |
3,200 mAh |
| Low battery voltage |
2.1 V⎓ |
| End-of-life battery voltage |
1.9 V⎓ |
| End-of-life battery capacity |
366 mAh |
| Manufacturer |
Huiderui |
| Enclosure |
|
| Dimensions |
75 x 76 x 27 mm |
| Weight |
97 g |
| Operating temperature range |
from −10°C to +40°C |
| Operating humidity |
up to 75% |
| Protection class |
IP50 |
| Colour | White or black |
| Complete set |
HomeSiren Jeweller SmartBracket mounting panel 2 x CR123A battery (pre-installed) Connector for an LED indicator Installation kit Quick start guide |
| AJA0388 | HomeSiren U Jeweller Black | In stock | |
| AJA0385 | HomeSiren U Jeweller White | In stock |
| Videos |
|---|
| No videos available |
| Files |
|---|
| Ajax HomeSiren U Jeweller Datasheet |
| Ajax HomeSiren U Jeweller User Manual |
| Links* |
|---|
| Ajax website |
| Ajax support site |
* External websites provide additional content that supports the content on connectec.uk however the external Web site is subject to change and is beyond the control of Connectec Ltd. Connectec cannot guarantee the accuracy of content on external websites and does not endorse the information or products on any external websites. You will be subject to the external websites own privacy policy when you follow these links.
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