Features: APP Control: You can use "SMART LIFE" APP in your smart phone to control the boiler switch wireless with Wi-Fi or 4G network, no hub required, you could turn on your water heater in advance, then enjoy a hot shower when arrived. Timer and Schedule Function: Take full control of water, you could plan the exact time to turn water heater appliances on/off automatically. All Families Members Could Control: This smart boiler switch can have several control sites shared by different family members. One mobile phone can control many switches also. Remote Control: 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. Wide Compatibility: The switch can be compatible with both for Mobile System, works with for Amazon Alexa/ for Echo, for Google Home. Specifications: Type: 20A super wifi switch ( Water Heater switch , Boiler Switch , Air conditional switch) Quantity: 1pc Material: ABS, Tempered Glass Color: Black Plug: US Power Supply: 90V-250VAC Max Current: 20A/gang Wireless: 802.11 b/g/n 2.4G Security: WPA-PSK/WPA2-PSK Package include: 1* 20A super Switch