The Intermatic 30 Amp 240-Volt DPST Electronic Water Heater Time Switch is a reliable and efficient device for controlling the operation of your water heater. With a timer function, you can easily manage the heating cycles of your electronic water heater. The model EH40 is compatible with universal smart home systems, making it a convenient addition to your home electrical setup. Perfect for electronics applications, this water heater time switch from Intermatic offers easy and precise control over your heating needs.