Velleman-8-Channel-Relay-Card-Kit-Velleman-VM129-p-The-Velleman-8-Channel-Relay-Card-can-be-used-to-convert-electronic-outputs-or-contacts-to-relay-contacts-This-results-in-a-practical-isolation-between-load-&-driving-circuit-Ideal-for-use-with-computer-interface-cards-or-infrared-remote-control-receivers-The-card-features-high-grade-input-&-output-connectors-p-Velleman-VM129-8-Channel-Relay-Card-Module-Pre-assembled