Velleman-DMX-Controlled-Relay-Switch-Whadda-WML138-P-The-Whadda-DMX-Controlled-Relay-module-uses-the-DMX512-protocol-to-control-dimmers-scanners-moving-head-spots-&-other-lighting-devices-with-simple-wiring-Also-available-as-a-kit-for-you-to-produce-your-own-module-P-Whadda-WML138-DMX-Controlled-Relay-Module-Pre-assembled