Take the original remote control in the left hand and our self-test remote control in the right hand. Press the two remote controls as close as possible, and press the corresponding buttons of the two remote controls at the same time, and the LED light keeps flashing, which indicates that the code of the keys of the original remote control has been changed by our Remote control for self-examination is copied. Press the buttons A and B at the same time, the light flashes, make sure the LED light flashes once, then turns off and does not let go. After 2 seconds, the LED light will start flashing, indicating that the code has been cleared. Press the CD button for two seconds at the same time, the LED indicator lights up after 3S, then flashes quickly, indicating that the auto-copy remote control code has been restored. Before to use our self-copying remote control to copy, be sure to clear the existing code of the self-copying remote control first, the LED flashing speed is determined by the transmitted oscillation resistance of the copied remote control!