Ricevitore telecomando universale porta garage 300~868MHz 868MHZ AC/DC 9V~30V US
(The LED will start flash. Keep this button pressed, until the LED will turn off. Programming a new remote. 2) Press the learn button. The will LED turn on. 4) Repeat step 2 for another button. 3) One re-ceiver can work with 400 codes.