Smart switch WiFi SONOFF 4CHPROR3Easy access to 3 modes of operation We have access to Self locking modes (allows you to switch on devices that remain on until they are manually switched off), interlock (when you switch on the other device, the other, previously switched on, is automatically switched off) and inching (when you switch on, the device is switched off after a predefined time) directly through the application on your phone. Separate handling of 4 devices The self locking
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