Sonoff 4ch pro r2 is upgraded from 4ch pro is an esp8285 based 4 channel (4-gang) din rail mount wifi switch.
Sonoff 4ch pro r2 supports connecting and control 4 home appliances, which can be turned on / off separately by the buttons or ios and android app ewelink. Owning a sonoff 4ch pro r2 means that you have 4 basic sonoff wifi switches to integrate together.
The enclosure is supported on din rail supported! A noise rail is a metal rail of a standard type widely used for mounting switches and industrial control equipment within the equipment racks. These products are typically made from laminated carbon steel sheets with a shiny zinc or chrome surface finish.
Sonoff 4ch pro r2 belongs to the sonoff family, it definitely carries all the basic functions sonoff has. In ewelink, you can remote switch on / off from anywhere at any time, set single/repeat / countdown time schedules to switch on / off at a specified time, share with others so they can control together.
Sonoff 4ch pro r2 is hacker-friendly so you can flash your firmware without difficulty.

Remote on / off -Turn on / off electrical devices from anywhere
Application support-ios and android mobile app ewelink
RF remote control -On / off by 433 MHz remote RF indoors
Independent control-control each gang separately
3 working modes - Switch between locking/self-locking/recoil modes
Adjustable delay time -Connect devices to 0.25-4 s in forwarding mode
Din rail mounted -Great for industrial control
Synchronization status -Real-time device status provided to the Timing application
-Scheduled setting/countdown timers to turn on / off at the specified time
Share control -Control your smart home together with your family
Scene -Turn on / off a gang of devices with one-touch
Smart scene: -Turn on / off by temperature, humidity, or other environmental conditions
Network support -Control of electrical devices over wifi or 2/3 / 4g of mobile network
Voice control -Works perfectly with Amazon Alexa, google home (stay tuned)