Take the original remote control in your left hand and the self-test remote control in your right hand. Press the two remote controls close together and simultaneously press the corresponding buttons on both remotes. If the LED light flashes continuously, it indicates that the button codes from the original remote have been successfully copied to the self-test remote control. Press buttons A and B at the same time. If the light flashes once and then turns off, keep holding. After 2 seconds, if the LED starts flashing, this indicates the existing code has been cleared. Press the CD button for two seconds. After 3 seconds, if the LED lights up and then flashes rapidly, it indicates that the remote control has been restored to factory settings. Before using the self-copying remote control, always clear any existing codes first. The speed of the LED flashing depends on the transmitted signal frequency of the original remote control being copied.