First, you have to buy the Power Mover Controller, which is the system's "brains." You put this in your cart and then choose the device features you want to control from below. If you have more than one, like two or more air conditioners, just choose the number you want and add it to your shopping cart. Once you've made your choices, go to the cart and follow the simple instructions. A member of the Smart Installations team will contact you shortly afterwards to organise an installation time. Happy Savings!