100% Code cleaning method: Press the unlock button and lock button at the same time (some models use the up button and down button). 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 indicator will enter fast flashing mode, indicating all memory data has been cleared. The remote control will not light up when any button is pressed after successful clearing. 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 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 areas with signal interference. If copying fails, clear the code and try again. Clear testing code before copying: Press the top two buttons simultaneously until the LED flashes three times rapidly. Release one button while keeping the other pressed, then press the released button three times. Release both buttons after the LED flashes quickly. If the LED does not turn on when pressing any button, the code has been successfully removed. Studying Code: Press and hold one button on this remote and the corresponding button on the original remote, holding them close together 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 useful codes are accidentally deleted, press the 3rd and 4th buttons simultaneously until the LED flashes quickly three times. Recovery is complete when the flashing stops. Easy to use 4-channel remote control system for controlling various devices, including cars, home systems, garages, and gates. This is not a complete list. If your remote operates on 433MHz frequency, it may be compatible with this duplicator (note: rolling code remotes are not supported). Compatible with original remote IC models 2262, 2260, 1527, 2240, and similar IC types. Uses 27A 12V battery. Replace the battery if the operating range decreases. Capable of cloning up to 4 remote signals from different remotes. Supports 433MHz fixed-code key fobs. Some compatible remotes operate on the 433MHz frequency. 4-Channel RF Wireless Remote Control Duplicator suitable for cars, garage doors, gate doors, alarm systems, and more.