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Wireless indoor siren. An audio alarm system with a customizable sound level between 81 and 105 dB and external LED connector. Maintains a connection to Ajax Hub at a distance of up to 2,000 meters in open space.  Maximum performance Works up to 2,000 meters from Ajax Hub in open space or across several floors of a business center. External LED connector. Powered by the built-in batteries. Alarm length and sound level are customizable (81-105 dB).  Protection from intruders and failure Tamper-resistant body. Disassembly immediately activates an alarm. Polling period from 12 seconds.  Effortless operation Works at temperatures between 0°C and +50°C and humidity up to 75%. Has a battery life of up to 5 years. Indicates current state (arm/disarm/armed). Battery indicator shows battery level.  Simple professional-level installation Interactive manual for easy installation. No need to disassemble the body when installing using SmartBracket mounts. The quality of the connection can be tested remotely.  Technical specification Device type: Wireless Use: Indoor Compatibility: Works only with Ajax Hub Alarm type: Sound External LED connector: Yes Sound alarm volume: Adjustable, 81-105 dB at the distance of 1 m Working frequency of piezo buzzer: 3.5±0.5 kHz Arm/disarm/armed state indication: Yes Power supply: From on-board batteries Battery type: 2 CR123A batteries, 3 V Battery indicator: Yes Battery life: Up to 5 years Standby current: 70 µA (when polling every 36 seconds) Tamper protection: Available Radio signal power: 25 mW Communication protocol: Jeweller (868.0-868.6 MHz) Maximum distance between detector and central unit: Up to 2,000 m (6,552 ft) (in open area) Polling interval: 12-300 sec (adjustable) Alarm triggering time: Less than a second Customizable alarm duration: Between 3 sec and 3 min Ingress protection: IP50 Working temperature range: From 0°C (+32°F) to +50°C (+122°F) Operating humidity: Up to 75% Dimensions: 75x75,6x26,6 mm (2.95x2.98x1.02 in) Weight: 96 g  Components Siren External LED connector 2 CR123A batteries (pre-installed) Installation set Manual