[Controlled by Amazon Alexa/Google Home] -- User can open or close water heater via voice through Alexa/ Google device to turn on/off the water heater or other home appliance. [APP Remote Control "eWeLink"] -- User can remote control water heater via smartphone by downloading APP at any time and anywhere, boiler switch compatible with iOS/Android device has 4G or 2.4Ghz WIFI network(IEEE 802.11 b/g/n). APP control also have share function, timing setting function. [Timing Function] -- Take full control of your home or office lights thanks to schedule timer that will allow you to plan the exact time to turn lights and appliances on/off automatically. [Share Device] -- This smart boiler switch can have several control sites shared by different family members. one mobile phone also can control many switches. [Control from Anywhere] -- Instantly turn on/off your appliance with your smart phone. The free app allows you to add as many smart switches as you'd like to keep track of multiple appliances at anytime and anywhere.