Ajax Superior StreetSiren Plus G3 Black Siren: Professional Anti-Sabotage Security for Indoors and Outdoors
137750.308.BL1 # 137750 - The Ajax Superior StreetSiren Plus G3 Jeweler is an elegant black outdoor and indoor siren designed to provide advanced security thanks to tamper protection, radio communication up to 3,500 m , and EN 50131 Grade 3 certification. It offers adjustable volume up to 107 dB , high-visibility LEDs, and alarm duration from 3 seconds to 3 minutes. With IP54/IK08 protection, it is resistant to atmospheric agents and tampering attempts, ensuring constant reliability. Installation is simple thanks to SmartBracket support and app configuration. Ideal for professional systems that require superior performance and maximum deterrence.
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137750.308.BL1 | WIRELESS SIREN WITH ADVANCED SABOTAGE PROTECTION - FOR INDOOR AND OUTDOOR USE

The Ajax Superior StreetSiren Plus G3 Jeweler, 137750.308.BL1 , black is a professional indoor and outdoor siren designed to ensure maximum security thanks to advanced tamper protection, radio communication up to 3,500 m and EN 50131 Grade 3 certification. Its rugged IP54/IK08 design ensures resistance to atmospheric agents, while the powerful alarm, adjustable up to 107 dB, together with clearly visible status LEDs, offers a high deterrent capacity. Easy to install with SmartBracket and full management via the Ajax app, it guarantees reliable performance and long battery life of up to 10 years thanks to the pre-installed batteries.
Main specifications:
- Adjustable volume 85–107 dB and alarm duration 3 s – 3 min
- Superior Jeweler communication up to 3,500 m
- Anti-sabotage protection, tampering and jamming detection
- LED indicators for system status, inputs/outputs, post-alarm
- EN 50131 Grade 3 certification and IP54/IK08 protection
- Easy installation with QR and SmartBracket support
Further details
Technical data sheet
| 137750.308.BL1 | |
| Communication | Superior Jeweler communication technology Proprietary wireless technology for transmitting commands, alarms, and events. Superior Jeweler is an upgraded version of the Jeweler radio protocol for Superior devices, ensuring compliance with EN 50131 (Grade 3). Key features:
865.0 - 868.0 MHz 868.0 - 868.6 MHz 868.7-869.2 MHz 869.4 - 869.65 MHz Maximum effective radiated power (ERP) up to 25 mW Automatic power control to reduce power consumption and radio interference. Radio signal modulation GFSK Radio communication range Up to 3,500 m Up to 11,450 ft Encrypted communication All stored and transmitted data is protected with advanced encryption, ensuring both confidentiality and integrity. Frequency hopping To prevent radio interference and jamming. Wings communication technology Proprietary wireless communication technology for uploading firmware updates. Key features:
865.0 - 868.0 MHz 868.0 - 868.6 MHz 868.7-869.2 MHz 869.4 - 869.65 MHz Radio communication range up to 2,000 m up to 6,550 ft Between the siren and a hub (or a range extender) in an open space. The maximum range depends on the hub model. Encrypted communication All stored and transmitted data is protected with advanced encryption, ensuring both confidentiality and integrity. Frequency hopping To prevent radio interference and jamming. |
| Key features |
Alarm type
Allows you to check whether the battery is sufficiently charged for normal operation. Event indication
Chime |
| Sabotage protection | Tamper alarm Notifications on attempts to open the siren's enclosure, detach the siren from the surface, or remove the siren from the mounting panel. Protection against spoofing device authentication Jamming detection The siren detects jamming and alarms about it. Communication loss detection after 36 s Detection time depends on the Jeweler or Jeweller/Fibra settings. |
| Power supply | Battery 8 × CR123A 3V⎓ lithium battery Pre-installed. Type type C Calculated battery life up to 10 years in standby mode up to 4.2 years with one 90-second alarm per day Operating voltage range 3.65−6.2 V⎓ Nominal operating voltage 3 V⎓ in standby mode 6 V⎓ when the siren sounds Quiescent current consumption at nominal voltage 84 µA Maximum current consumption at nominal voltage 640 mA When the siren sounds at the Very Loud volume level. Peak current consumption at nominal voltage 960 mА When the siren sounds at the Very loud volume level. Average current consumption at nominal voltage 125 mA When the siren sounds at the default volume level. Regardless of the security mode. Full battery capacity 12,800 mAh Capacity of each battery is 1600 mAh. Low battery voltage 4.69 V⎓ End-of-life battery voltage 4 V⎓ Manufacturer Huiderui Electric shock protection class Class III |
| Optional power supply | Remote power supply's operating voltage 9.6−14.4 V⎓ Remote power supply's nominal voltage 12 V⎓ |
| Enclosure | Dimensions dimensions 210 × 210 × 71 mm 8.28″ × 8.28″ × 2.78″ Weight 1.124 g 39.65 oz Operating temperature range from −25 °C to +60 °C from −13 °F to 140 °F Operating humidity up to 95% with no condensation Protection class IP54, IK08 |
| Color | Black |
| Complete set | Superior StreetSiren Plus G3 Jeweller SmartBracket mounting panel Installation kit Quick start guide |
| Warranty | 24 months |



