Taidacent Voice-Activated Alarm Induction Corridor 24V Sound Activated Delay Switch Sound Delay Relay Sound Sensor Module

Price: $46.84
(as of Feb 23, 2023 03:28:05 UTC – Details)

This module is triggered by sound. When the sound reaches a certain value, it will close instantly.
can do a variety of alarm delay trigger, such as earthquake alarm, burglar alarm
the output can be connected to AC 250V 30A or DC 30V 30A load