This high-quality temperature remote controller enables you to easily control the temperature of your Takagi tankless water heater/boiler. With a maximum amperage of 40 A, it is a highly efficient addition to any home. The controller is compatible with both the TM-RE40 and TM-RE42 models and is ideal for controlling your water temperature with ease. The brand Takagi is known for its quality products and this controller is no exception. It is a must-have for anyone looking to maximize the performance of their Takagi water heater/boiler.