Inching Timer - You can set the switch operation time on App according to your need (1-60 minutes) , after you touch on the switch by manual touch or on App, the switch will be off automatically. For example, if you set 30 minuts time, so after 30 minutes you touch on the manual switch or on App, then the switch will turn off automatically. Set Sechdule Timer for the Boiler - It can turn on/ turn off the switch automatically. Restart Status - When you go out, set the "Restart Status" of your boiler.(ON, OFF or Remember last status) 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 . 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 Input Voltage:100-250VAC, 50/60Hz Output Voltage:100-250VAC, 50/60Hz Max Load:20A App Name:Smart Life, Tuya App Voice Control:for Assistant, for Alexa Wireless Protocol:2.4GHz Wi-Fi Reliable and Max Load:4400W US Standard 503 Size US and Switch size, the distance between the screws to fit your wall box is 83.5mm Tuya Smart Life: Free App Name:Smart Life,or Tuya App Support Android and IOS Touch panel to turn on/off - The panel is glass , waterproof, safe to touch it. Colour:Black Material:Plastic Size:120mm x 72mm x 33mm Package Contents: 1 * Smart Boiler Switch(US Standard 20A) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.