Tuya Smart Life - Free App Name: Smart Life ,or Tuya App- Support Android and IOS Voice Control - Google Assistant- Amazon Echo Alexa APP Remote Control Remote control your water heater / boiler by App, Turn it on in advance, so that you can enjoy a warm shower when you arrive at home. App feedback for ON or OFF - When you touch on App, it will gives you a feedback that it's on or off.- Feedback Function, you can monitor the status of the water heater anywhere Set Sechdule Timer for the Boiler It can turn on/ turn off the switch automatically . Touch panel to turn on/off The panel is glass , waterproof, safe to touch it. Reliable and Durable Max Load: 4400W US Standard 503 Size - Dimensions: 120mm*72mm*33mm- US and Gewiss Switch size, the distance between the screws to fit your wall box is 83.5mm Boiler Switch Installation Method - Please refer to below picture- Neutral wire is required for your boiler. Specification Input Voltage: 100-250VAC, 50/60HzOutput Voltage: 100-250VAC, 50/60HzMax Load: 20A, 4400WApp Name: Smart Life, Tuya AppVoice Control: Google Assistant, Amazon AlexaWireless Protocol: ZigBee 3.0Switch Dimensions: 120mm*72mm*33mmPlastic Material: Fireproof ABSCertification: CE, RED, EMC, RoHSProduced by ISO9001:2015 factory: YesPatented Product: Yes