... barrier) at the entrance.This remote wireless control is fit for car alarms, home alarms, panic buttons, garage door, rolling curtain, etc ... to face learning in secondsApplication:car alarms, home alarms, panic buttons, garage door, rolling curtain, etcFrequency:315Mhz or 433MhzLearning code ... learnt. Do the same operation for the other 3 buttons. It can even learn different code remote (same frequency ...