Power off alarm single phase 220V380V three-phase three-four-wire phase outage call reminds the farm to be super loud and anti-theft

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Color classification:: 220V single-phase) power-off alarm) red horn 220V single-phase) incoming call power failure alarm) red speaker 380V three-phase three-wire) power-off alarm) red speaker 380V three-phase three-wire) incoming power-off alarm) red speaker 380V three-phase four-wire) power-off alarm) red horn 380V three-phase four-wire) incoming power out alarm) red horn 220V single-phase) black speaker 220V single-phase alarm) black horn 380V three-phase three-wire) black horn 380V three-phase three-wire) Incoming call power off alarm) black speaker 380V three-phase four-wire) power off alarm) black speaker 380V three-phase four-wire) incoming call power off alarm) black speaker 220V single phase) power off alarm) sound and light integration 380V three-phase three-wire) power off alarm) sound and light integration 380V three-phase four-wire) power off alarm) sound and light integration