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It can also be triggered by an external pulse signal. 1 pcs DC 5-24V 4 Channel Bluetooth 4.0 Relay Module. 3 Bluetooth protocol: Bluetooth Specification V4.0 BLE. 8 External trigger input, opto-isolated switch, low pulse inputs.
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.