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![Audio Frequency Activated Relay Module, 2-15 KHz](https://images.findtheneedle.co.uk/findtheneedle/products/4698132.jpg)
This audio frequency switched relay board will activate the onboard relay when the module detects the pre-selected input frequency from 2 KHz -15 KHz...
For more information on Audio Frequency Activated Relay Module, 2-15 KHz talk to QUASAR ELECTRONICS LIMITED
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