The default control command is 1/2/3/4. Example: Dial 1 to control relay 1, dial 2 to control relay 2, dial 3 to control relay 3, dial 4 to control relay 4; control commands can be changed any 1-4 bits. (For more details, refer to "AD22B04_4 channel DTMF controller commands setting manual ").
Working voltage DC 12V, this signal decoder relay ahs reverse polarity protection which can extend the service life.
If you have any questions about this signal decoder, please feel to contact us, we will solve the problem for you as soon as possible, and welcome your purchase.
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