The power controller is connected between the mains supply and the light source. It switches on the supply to the light source when the exposure is started, and switches it off again when the exposure is completed (or paused). WARNING: This version is a “bare bones” configuration for mounting inside a light unit. It should only be installed by a competent electrician because mis-installation exposes you to the risk of mains electric shock. This power controller is rated for a maximum load 10A at 110/220/240Vac. What’s in the box: Power Controller 1m Control Cable (connects to the light integrator) This device requires an LC6, LC5, LC4 or LC3+ light integrator. The LC3 and LC2 will not work with this power controller. A lower cost 'red' 5A variant is available by special order. Please contact me for more details. Minimum order quantities apply.