One by one copy , save each button copied memory separately .  Repeatedly copy RF signal from other transmitter buttons for millions times . For fixed frequency copy , you can directly copy RF signal information from other transmitter . For changing frequency copy , such as 315MHz ,you want to copy 433.92MHz , so you need open the cover of such transmitter and adjust the frequency to 433.92MHz.

How to copy :

1.)    Firstly ,clear up test stored RF signal memory from factory by keep pressing two buttons together, the led flash slowly to flash fast in 3 seconds ,release you hand and no led indication by pressing any button . it is ok now .

2.)    Take the transmitter to be learned , keep pressing any button on such transmitter ,then approach your copy transmitter to it and keep pressing one button , the led on the copy transmitter will change from no light –flash slowly-flash fast in 4 seconds . it show copy is successful.

3.)    Repeat above-mentioned step to copy other button on the transmitter to be learned.