Code cleaning method: Press the unlock button and lock button at the same time (some models use the up and down buttons). When the LED indicator flashes three times, release one button while continuing to press the other. Then press the released button three times. The LED will enter fast flashing mode, indicating all memory data is cleared. After clearing, the LED will not light up when any button is pressed. Copy method: Hold the original remote in one hand and the copy remote in the other, placing them as close together as possibleideally side by side with no gap. Press the copy button on both remotes simultaneously. When the LED flashes quickly after three initial flashes, the copying process is successful. Repeat for other buttons. For remotes with lower transmitting power, place the original remote directly against the copy remote during operation. Avoid operating in noisy or interference-prone environments. If copying fails, clear the code and retry. Clear testing code before copying: Press the top two buttons simultaneously until the LED flashes three times quickly. Release one button while keeping the other pressed, then press the released button three times. Release both buttons after the LED flashes rapidly. If the LED does not turn on when pressing any button, the code has been successfully erased. Studying Code: Press and hold one button on the copy remote and the corresponding button on the original remote at the same time, keeping them close for 3 seconds. The LED will flash quickly and then stay on. Release the buttons. Test by pressing the copied buttonif the LED lights up, the copy was successful. Repeat for remaining buttons. Recovery function: If codes are accidentally deleted, press the 3rd and 4th buttons simultaneously until the LED flashes quickly three times. The previous codes will be restored. Easy to use 4-channel remote control system for controlling various devices, including cars, home systems, garages, gates, and alarm systems. This is not a complete list. The duplicator works with 433MHz fixed-code remotes (rolling code remotes are not compatible). Compatible with original remote IC models: 2262, 2260, 1527, 2240, and similar ICs. Uses a 27A 12V battery. Replace the battery if the operating range decreases. Can clone up to 4 remote signals from different remotes. Supports 433MHz fixed-code key fobs. 4-Channel RF Wireless Remote Control Duplicator for Cars, Garage Doors, Gate Doors, Alarm Systems, and more.