The 5VDC input, nano size and dry-contact output makes it different from traditional SONOFF product, there are two working modes for the product: inching mode and self-locking mode. users can switch these two modes on eWeLink app.when the module is switched to the self-locking mode, users can turn on/off the connected appliance instantly. when the module is switched to the inching mode, users can press the ON/OFF toggle button to turn on or off connected devices.The product enables remote control of home appliances through the mobile application eWeLink, available on both Android and iOS. Supported functions include:Remote turn on/offTiming SchedulesDevice SharingGroup ManagementWorks with Echo, Echo Dot, TapWorks with Google Home, Google NestWorks with IFTTT<br> Works With Alexa<br> This product works with Alexa. You can ask Alexa to control the device with the following voice commands. Please note that only US/UK English and German voice commands are supported now.Try out these phrases ( {deviceName} should be the name of your device):Alexa, turn on {deviceName}Alexa, turn off {deviceName}Alexa, turn {deviceName} offAlexa, turn {deviceName} onAlexa, schalte Gerätename einAlexa, schalte Gerätename aus<br> Specification:<br> Power Supply: 5V DCDry contact output Max Current: 10AHumidity: 5%-90%RH, Non-condensing