Sonoff 4CH is a 4-gang with din rail mounting. Sonoff 4CH 4 gang morality switch to connect and see to it 4 electric appliances, which can be turned on/off separately by the buttons or iOS/Android App EweLink. Besides, with the multi gang switch, you can period of time devices status for each device on App. a Sonoff 4CH multi gang switch means you have 4 Sonoff programming language local area network switches integrate together. Sonoff 4CH 4 gang local area network morality switch belongs to Sonoff family, definitely, it all the functions programming language Sonoff has. In EweLink, you removed turn on/off from anywhere at any time, set single/repeat/countdown timing schedules to turn on/off at a such time, share to others so that they can see to it together.Now the Sonoff 4CH can perfectly works with Amazon Alexa. Just Alexa to turn on/off Sonoff 4CH. Please note that exclusively US/UK liberal arts and High German voice commands are supported now.The default names for the 4 gangs : outlet 1, outlet 2, outlet 3, outlet 4. You can the name if you like.Standard voice see to it commands phrases for Sonoff 4CH and Sonoff 4CH Pro : Alexa, turn on -LCB- deviceName -RCB- -LCB- gangName -RCB- Alexa, turn inactive -LCB- deviceName -RCB- -LCB- gangName -RCB- Explanation : if the device name of your Sonoff 4CH is `` My Switch '', the gang name is `` Outlet 1 '', then you can see to it with `` Alexa, turn on My Switch Outlet 1 ''. Works With Google Nest.It can data from Google Nest like temperature, humidity, anybody home or not. Then according to these data, it can spruce scenes to see to it associated devices.Specification • Voltage range : 90-250v AC -LRB- 50/60Hz -RRB- • Max stream : 10A/gang • Max Power : 2200W/gang • Wireless Frequency : local area network 2.4 Ghz • Operating Temperature -LRB- recommended -RRB- : 0ºC-40ºC -LRB- 32 °F -104 °F -RRB- • Operating Humidity : 5 % -90 % RH, Non-condensing ESP8285 Datasheet : https://www.itead.cc/wiki/images/8/8e/0A-ESP8285_Datasheet_EN.pdfUser practice : http://ewelink.coolkit.cc/?p=252 .