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4pcs Relay Module DC 24V Relay Board 1 Channel with Optocoupler Isolation Support High or Low Level Trigger. It will not be shared in any other way, your details are 100% secure. Jumper Design: The Relay Module has a Jumper That You Can Set Rather the Unit State Changes with High or Low Signal.
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.