1, Clear out code:
Press A and B at the same time, two seconds later, LED flashes three times, followed by a continuous fast blinking. Indicates that the remote control code stored was deleted.
Copy Universal RF 433MHz remote control duplicator KL180-4k
2, Duplicating (learning)
Right Hands press original remote control A, and left hand press remote control duplicator A', 2 remote controls put together as close as possible, while pressing the remote controls two match button,(eg: A-A',B-B') three seconds later, LED indicator light flashes three times, followed by a continuous fast blinking. That's mean successfully copied.
3, Recovery code
Press A and C at same time , 3 seconds later, LED indicator light flashes three times, followed by a continuous fast blinking. This indicates that the original remote control codes have been restored.
The other way, you can delete all and relearn them again.