Hold the original remote in your left hand and our self-test remote in your right hand. Please press the two remotes as close as possible and press the corresponding buttons of both remotes at the same time, and the LED light keeps flashing, indicating that our remote has changed the key code of the original remote. -The exam is copied. Press 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 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 the auto-copy remote control code has been restored. Before using our auto-copy remote control to copy, be sure to clear the existing code of the auto-copy remote control first, the LED flashing speed is determined by the transmitted oscillation resistance of the copied remote control! There is a method to test if the existing auto-copy remote code has been erased successfully: when the erase operation is complete, you can press any key, if the light flashes once immediately and then turns off, it means the sub-copy code has been cleared. Reference models the 433 MHz remote can be used on are 2262, 2260, 5026, 5326, 5326-3, 5326-4, FP527, PT2240, EV1527, HT6010, HT6014, HT12E, HT640, HT680, PLC168, SMC series, 9XX, PT2292, 12L-4SC, HT6026, UM375 0AM.