Balboa 50-BP1-500-5R-K BP100 Spa System 2-Load 5.5KW with TP500 Panel and Remote 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 remote heater. It includes a TP500 panel that utilizes patented Piezo electronic switch technology and unique potting techniques to eliminate moisture in harsh environments.