There is one of these things. S319A Built-in remote gate opener.
To open the barrier from the car and not get out of it decided to try to program.
Programming:
Press keys 1 and 3 and holds them down until the LED above key 2 flashes, then release the keys. This erases the previously programmed keys.
Place a radio key, e.g. from a garage door, about 5 cm in front of the keys.
Press the desired key of the radio key at the same time as keys 1, 2, or 3.
Hold down both keys until the LED flashes first slowly and then quickly.
Reprogramming one individual memory key
Press key 1, 2, or 3.
Place a radio key, e.g. from a garage door, approx. 5 cm in front of the keys.
Press the desired key of your radio key at the same time as keys 1, 2, or 3.
Hold down both keys until the LED flashes slowly and then quickly.
Using the memory keys
Press key 1, 2 or 3 to activate the corresponding equipment.
Erasing all remote control programs
Press keys 1 and 3 and hold them down until the LED flashes rapidly, then release the keys.
WARNING
Be careful when using the remote control. For example, when closing the garage door, make sure that no one is in the movement area of the door, otherwise serious injury could occur.
You did everything according to the instructions – the lights blinked. Pressed the button in the car – the gate opened! It works!
p.s. I have a frequency 433.92 – European. The Americans have 315 MHz