Sonoff BASICR4 User manual

Hello! I've reviewed the user manual for the SONOFF BASICR4 Smart Switch, which is a Wi-Fi enabled device that allows for remote control of home appliances, voice control, timer scheduling, and also has magic switch mode. Also it has auxilary overheat protection. I am ready to help you with any questions you might have about this device and its features.
How do I enter pairing mode?

What does the Wi-Fi LED indicator flashing two short and one long mean?

What is 'Magic Switch Mode'?