The Power Box is equipped with 8 main power outlets, and seven USB connectors, as well as direct connections for level and temperature probes. All other probes are connected via the USB ports and a corresponding interface to the Power Box. If more than seven connections are needed, a USB hub can be added. Several Power Boxes can be connected to one AT-Control via USB ports. This enables several aquariums with many different probes to be connected to one AT-Control unit. Set points can be programmed as fixed points or as arithmetic curves. For example, temperature can be programmed to follow a day/night curve and regulated with heaters and chillers.