Please refer to the Sonoff 4CH Pro/Sonoff 4CH Pro R2’s delay time setting
list below:
4. RF Remote Settings
Learn with 433MHz RF Remote:Each gang can supports 1 RF key, which
means each gang can only remember the RF key learned last time. Quickly
press twice one of the switches below, then press one of the ABCD buttons
on your RF Remote. If learned successfully, the button will lit up in red,
and the corresponding status LED will blink in green for 4 times. You can
press the button to turn on or turn off the corresponding channel.