【20Amp Heavy Duty Switch】If you need a reliable and powerful smart switch to deal with high-power appliances, our 20Amp Heavy Duty Switch is your best choice, up to 20Amp, 4400W, ensuring stable and safe electricity supply in your home, neutral wire required, 2.4GHz WiFi only. 【Energy Monitor】Are you still worried about your water heater consuming too much energy? YIFAN smart energy monitoring switch helps you understand and efficiently manage the energy of high-power appliances, so as to reduce unnecessary energy consumption and electricity bills. 【Multiple Control Methods】Our smart WiFi switch has a variety of flexible control methods for you to choose from, which can be controlled remotely through Smart Life APP/TUYA APP, voice control through compatible Amazon Echo or Google Home, or manually control the working time (10-90 minutes) on the switch panel when there is no network. 【Schedule & Timer】YIFAN Smart Water Heater Timer Switch supports automatically turning on/off the connected device at the specified date and time; and it can also help you track the historical on/off time of the device, which is convenient for you to better manage and adjust your daily life. 【Multi-function In One】This smart switch also includes child lock function, family sharing, group control, 30-minute offline reminder, and 3 power-off restart states (on/off/remember last status), it is an ideal choice for you to control high-power appliances, not only water heaters or air conditioners but also suitable for equipment below 20A in factories or commercial places.