External Contactor Module (15A) with blue indication LED follows lights-on for main channel. Use ECMs to switch CO2, fertigation, heating etc. during lights-on or lights-off cycle. ECMs can be positioned close to the actual accessories. Cable outputs with female and male connector allow easy connection of accessories. Contains industrial contactor, suitable to power 15A loads or to power trigger input. Cage clamp connection for control cord allows easy installation.