①. [Compatibility]: Perfectly designed for Hayward Universal H-Series Low Nox Pool Heater models including H150FDN/P, H200FDN/P, H250FDN/P, H300FDN/P, H350FDN/P, and H400FDN/P. Ensures a precise fit and function for optimal performance. ②. [High Performance]: The FDXLICB1930 FD Series Integrated Control Board is a replacement for Hayward H-Series Low NOX Heaters. Suitable for models manufactured post-September 20, 2004, with model numbers ending in FDN or FDP. ③. [Direct Replacement]: Engineered to meet or exceed Part Number specifications, this control board offers a seamless installation process. Replace old parts directly without any modifications for a reliable and stable performance. ④. [Durable Material]: Constructed from upgraded materials for enhanced moisture resistance and durability. The robust design ensures a longer service life and dependable operation under various environmental conditions. ⑤. [Energy Efficient]: Optimize the efficiency of your pool heater with this energy-efficient control board. It not only improves performance but also contributes to the overall energy management of your pool system. ⑥. The product appearance and printed words may vary depending on the batch, but this does not affect use. ⑦. Colour: Green ⑧. Material: Electronic component ⑨. Package Contents: 1 * FDXLICB1930 FD Integrated Control Board Replacement Kit ⑩. Only the above package content, other products are not included. ⑪. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.