Just simply plug in this sophisticated automation expansion module, it then connects to your Halo Chlor to now become a mini pool automation system. With ports and plugs to operate 2x power outlets (max 9.5A combined), 4 x valve actuators, heater inputs (use with gas, heat pump, or solar), temperature sensors, and more. So if you have multiple pumps, water features, heaters etc this is the perfect add-on for your Halo Chlor, to allow for complete control of your pool equipment