Features: This digital display temperature controller circuit board replacement ensures precise temperature regulation ln tsi200 LN TSI200, 250, 300, and 400 series pool and spa heaters, eliminating analog control errors for accurate management. Featuring PCB and plastic construction, it boasts a durability design resistant to moisture corrosions, with digital interfaces for straightforward operating and easy compatibility. Ideal for homeowners and enthusiasts reliabledly, user friendly to maintain their pool or spa heating systems without professional assistance. Perfect for outdoor installations in pool and spa heaters where consistent temperature control is essential, enhancing performances in various aquatic environments. Allows for quick and easy installation, upgrading your equipment with intuitived digital readings for seamless daily use. Specifications: Component: PCB+plastic Size: 17.7x10cm Suitable for ln tsi200 LN TSI200, 250, 300, 400 series Support Digital Display Thermostat Circuit Board Replacement Compatible model 472100, ensuring precise temperature control and reliabled performanced Designed specifically for pool and spa heaters to provide efficient temperature management Package Includes: 1PC 472100 Swimming Pool Heater Digital Display Thermostat Circuit Board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution