EIIDAR Heater Relay Board Replace 77119 (Formerly 74618), Fit for IQ 2020 of Watkins, SPA Heater Relay Control Board. Item Weight:? 8.4 ounces. Product Dimensions:? 6 x 5.5 x 2 inches. Country of Origin:? China. Item model number:? ED-SPA. Included Components:? Instructions, 3 FUSE. Date First Available: January 14, 2023. Replace for Watkins etc model 74618 and 73357 and 77119. Used on Caldera, Hot Springs, Tiger River, Lime Light Spas.. With 3 Fuse, Detailed instructions and wiring diagrams. Replace for Watkins etc model 74618 and 73357 and 77119, Used on Caldera, Hot Springs, Tiger River, Lime Light Spas.. Your receive the wrong item.