Sound alarm with a customizable sound level between 81 and 97 dB. In open spaces it maintains communication with the Hub Ajax until distance of 2,000 meters Sound alarm volume: adjustable 81-97 db at a distance of 1 meter Frequency of operation of the piezo cycline: 3.4 ± 0.5 kHz Indication of the state of insertion/disarming/inserted: yes Power supply: from the integrated battery Battery type: 4 x battery cr123a, 3v Battery life: up to 5 years Antimanomission protection: Available Jeweller 868MHz communication protocol Max distance. Between Sirena and Hub: up to 2,000 meters (in the free area) Radio monitoring: synchronization with the central unit every 12 - 300 seconds (customizable) Alarm activation time: less than 1 second Customizable alarm duration: from 3 seconds to 3 minutes Oper.
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