100% 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 indicator will enter fast flashing mode, indicating all memory data is cleared. The remote control will no longer 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 quickly after three initial flashes, 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 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 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 the remote to be copied and the corresponding button on the duplicator remote, keeping them close for about 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 quickly three times. Recovery is complete when the LED responds accordingly. Easy to use 4-channel remote control system for controlling various devices, including cars, home appliances, garage doors, and gates. This is not a complete list. If your remote operates on 433MHz frequency, it may be compatible (note: rolling code remotes are not supported). Compatible with IC models 2262, 2260, 1527, 2240, and similar IC types. Uses a 27A 12V battery. Replace the battery if the operating range decreases. Clone up to 4 remote signals from 4 different remotes. Supports 433MHz fixed-code key fobs. Suitable for use with various 433MHz remote-controlled systems. 4-Channel RF Wireless Remote Control Duplicator for Cars, Garage Doors, Gate Doors, Alarm Systems, and more.