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Any device that communicates with associated control/receiving equipment by low-power radio signals. (SIG-PRO)
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3.3.149 Definitions, Low-Power Radio Transmitter
Any device that communicates with associated control/receiving equipment by low-power radio signals. (SIG-PRO) ...
23.16.3.2 Protected Premises Fire Alarm Systems,
Each low-power radio transmitter shall automatically repeat alarm transmission at intervals not exceeding 60 seconds until the initiating device ...