Code cleaning method: Press the unlock button and lock button at the same time (some models use the up and down buttons). After 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 possible—ideally side by side with no gap. Press the copy button on both remotes simultaneously. When the LED flashes three times and then flashes rapidly, the copying process is successful. Repeat for other buttons. For remotes with lower transmission power, position the original remote close to 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. Press the released button three times, then 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 cleared. Learning code: Press and hold one 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. The LED will flash quickly and then stay on. Release the buttons. Test by pressing the copied button; if the LED lights up, the copy was successful. Repeat for other buttons. Recovery function: If codes are accidentally deleted, press the 3rd and 4th buttons simultaneously until the LED flashes rapidly three times. The original codes will be restored. Easy to use 4-channel remote control system for controlling various devices, including cars, home systems, garage doors, and gates. This is not a complete list. Compatible with 433MHz fixed-code remotes. Note: Rolling code remotes are not supported. Supports IC models 2262, 2260, 1527, 2240, and compatible ICs. Uses a 27A 12V battery. Replace the battery if the operating range decreases. Can clone up to 4 remote signals from different remotes. Works with 433MHz fixed-code key fobs. 4-Channel RF Wireless Remote Control Duplicator suitable for cars, garage doors, gate doors, alarm systems, and more.