Balboa 50-BP1-200-40-K BP100 Spa System 2-Load 4KW with TP200 Panel and Fixed Heater - The BP100 Entry Level Spa Control System smoothly integrates with bwa™, ControlMySpa™, bba™ and Balboa's Topside Panels. It features a compact size with removable feet and a fixed heater. It includes a TP200 panel that utilizes patented Piezo electronic switch technology and unique potting techniques to eliminate moisture in harsh environments.