Power Input: The 3-pin IEC socket connects the fixture to AC power using a standard power cable.Power Switch: A red rocker switch toggles the unit ON or OFF.DMX IN (Data Input): A male 3-pin XLR port that receives DMX512 control signals from a lighting console or software interface.DMX OUT (Data Output): A female 3-pin XLR port used to daisy-chain the signal to subsequent intelligent lighting fixtures on the same data run.