General description This is a universal garage door remote control with a fixed frequency of 433.92 MHz, designed to duplicate common fixed code remote controls and learning functions. It features a small key ring for easy portability and can directly replace old or damaged originals. The buttons are equipped with sliding covers to prevent accidental operation. Technical specifications Frequency: 433.92 MHz Number of buttons: 4 Installation Steps to erase codes: Simultaneously press and hold the left and right buttons on the top of the remote control. The LED indicator will flash 3 times. Release the left button (do not release the right) and click the left button 3 times. The LED indicator will flash quickly, indicating that all memory data has been erased. Steps to copy the code: Hold the original remote control in one hand and the copied remote control in the other. Place both remote controls side by side on a desk. Press the buttons you want to copy at the same time. If the LED