BFT MITTO 2B radio gate opener, 2 channels, 433.92 MHz, rolling code

A fully functioning radio transmitter is required for duplication.
The duplication procedure must be carried out in the vicinity of the receiver.
1 - Press the hidden button of the working remote control with a pin (if it is not present, press buttons 1 and 2 together until the LED lights up).
2 - Press the button of the working remote control you wish to duplicate.
3 - Within 10 seconds, press the hidden key of the new remote control (if it is not present, press keys 1 and 2 together until the LED comes on).
4 - Press the key to be memorised on the new remote control, wait 10 seconds and try opening.

INSTRUCTIONS (Radio receiver). The duplication procedure must be carried out close to the receiver.
1 - Open the radio receiver and press the SW1 key once; the receiver LED flashes.
2 - Press the hidden button of the new radio receiver until the receiver LED stays on.
3 - Press the button on the new radio control until the LED starts flashing again; wait for it to go out.
4 - To memorise the second channel, press the SW2 button on the receiver and follow the same procedure.