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1 PCS DC 12V 4 Channel DTMF Relay Board ;. Relay maximum load capacity: DC 0-48V/6A; AC 85-250V/5A. Dial number 1, the relay 1(Out 1) is close, relay 2/3/4(OUT 2/3/4) is open. Dial number 2, the relay 2(Out 2) is close, relay 1/3/4(OUT 1/3/4) is open.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.