Comprehensive Compatibility: Designed for seamless integration with Sta-Rite Max-E-Therm models (SR200NA, SR333NA, SR400NA, SR200HD, SR333HD, SR400HD). This kit serves as a direct replacement for part number 460805, covering both natural gas and propane pool and spa heater electrical systems. Enhanced Control System: Includes a 42002-0007S Control Board and a 42002-0029Z/472610Z Film Pad. Designed to resolve common issues such as temperature adjustment failures and unresponsive controls, improving heating efficiency and system responsiveness. Advanced Technology Upgrades: Features an LM2576HVS chip and high-quality filter capacitors for clean and stable DC power delivery. Includes a high-quality optocoupler for improved output response and reliable operation. User-Friendly Installation: Installation requires disconnecting power, opening the heater top, removing the old board and membrane pads, and disconnecting wire connectors. A step-by-step guide is included to support setup. Color: Green Material: Plastic and Metal Package Contents: 1 x Control Board