100% 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 has been cleared. After clearing, the LED will not light up regardless of which 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 possible—ideally side by side with no gap. Simultaneously press the copy button on both remotes. When the LED on the copy remote flashes three times and then begins rapid flashing, the copying process is successful. Repeat this process for other buttons. For remotes with lower transmission power, position the original remote directly against the copy remote during operation. Avoid operating in areas with signal interference. 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 any button is pressed, the code has been successfully removed. Studying Code: Press and hold a button on the remote to be copied and the corresponding button on the copy remote at the same time, keeping them close for 3 seconds. When the LED flashes quickly and then stays on, release the buttons. Test the copied button; if 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 rapidly three times. The previous codes will be restored. Easy to use 4-channel remote control system allows control of various devices including cars, garage doors, gates, and alarm systems. This remote duplicator works with 433MHz fixed code remotes. Note: 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 remote range decreases. Can clone up to 4 remote signals from different remotes. Supports control of 433MHz fixed code key fobs. Suitable for use with cars, garage doors, gate doors, alarm systems, and other RF-controlled devices.