The Ajax HomeSiren U Jeweller warns intruders and alerts people nearby when the Ajax alarm is triggered. It is wireless, using Ajax's encrypted two-way Jeweller radio.
We supply and install Ajax alarm and video systems across London and the Home Counties. Add this to your package and we will check everything works together before sending a written quote.
Key specifications
| Classification | Radio channel security sounder |
|---|---|
| Installation method | Indoors |
| Compatibility | Operates with Hub, Hub Plus, Hub 2, and ReX |
| Type of notification | Sound |
| Connector for external LED | Available |
| Sound volume level | Adjustable, 81-105 dB at a distance of 1 m |
| Alarm length | Adjustable, 3−180 s |
| Jeweller radio technology | Communication range with central unit: up to 2,000 m in an open space, Two-way communication between devices, Operating frequencies: 868.0 – 868.6 MHz, Self-… |
| Power supply | Battery: Two CR123A batteries, Power supply voltage: 3V, Battery life: up to 5 years |
| Permissible humidity | Up to 75% |
| Operating temperature range | -10°С to +40°С |
| Anti-sabotage | Protection against fraud, Jamming detection, Tamper-resistant |
| Dimensions | 75mm х 76mm × 27mm |
| Weight | 97g |
Specifications are the manufacturer’s published figures.







