Sonoff 4CH R3 /4CH PRO R3 4 Gang Smart WIFI Switch 433MHZ Din Rail Mounting Wirele Remote Control Timer DIY Switch Via Ewelink Overview Sonoff 4CH R3 is a 4-gang switch with din rail mounting. Sonoff 4CH R3 4 gang light switch supports to connect and control 4 electrical appliances, which can be turned on/off separately by the buttons or iOS/Android App EweLink. Besides, with the multi gang switch, you can check real-time devices status for each device on App. Owning a Sonoff 4CH R3 multi gang switch means you have 4 Sonoff basic WiFi switches integrate together.The enclosure is din rail mount supported! A DIN rail is a metal rail of a standard type widely used for mounting circuit breakers and industrial control equipment inside equipment racks. These products are typically made from cold rolled carbon steel sheet with a zinc-plated or chromated bright surface finish.Sonoff 4CH R3 4 gang WiFi light switch belongs to Sonoff family, definitely, it bears all the functions basic Sonoff has. In EweLink, you can remote turn on/off from anywhere at any time, set single/repeat/countdown timing schedules to turn on/off at a specified time, share to others so that they can control together.Sonoff 4CH R3 is hacker-friendly that you can flash your firmware without difficulty.Works With Alexa You can ask Alexa to turn on/off Sonoff 4CH R3.The default names for the 4 gangs are: outlet 1, outlet 2, outlet 3, outlet 4. You can change the name if you like.Standard voice control commands phrases for Sonoff 4CH and Sonoff 4CH Pro:Alexa, turn on Alexa, turn off Explanation: if the device name of your Sonoff 4CH is "My Switch", the gang name is "Outlet 1", then you can control with "Alexa, turn on My Switch Outlet 1". Sonoff 4CH Pro R3 is a 4 gang WiFi switch. It supports switching among 3 working modes: interlock/self-locking/inching mode. It integrates with a 433MHz RF receiver module, making it poible for the switch to be controlled by RF Remote. The Sonoff 4CH Pro R3 smart switch is DIN Rail mounted. You can ask Alexa to turn on/off Sonoff 4CH Pro R3. 4CH PRO R3 Features Turn on/off 4 home appliances remotelySupports switching among inching/interlock/self-locking modesDevice status's synchronously displaySingle/Repeat/Countdown timersShare controlSupports setting power on state433MHz RF Remote controlWorks with AlexaWorks with Nest 4CH PRO R3 Specifications Voltage range: 100-240v AC(50/60Hz) / 5-24v DCMax current: 10A/gangMax Power: 2200W/gangWirele Frequency: WiFi 2.4GHzOperating Temperature(recommended): 0ºC-40ºC(32°F-104°F)Operating Humidity: 5%-90%RH, Non-condensing