100% 1.Code cleaning method: Press the unlock button and lock button at the same time(some shells are the up button and down button), after the LED indicator light flashes three times, loosen any one of the buttons while the other is kept pressing, then push the released button three times, the LED indicator will enter into the fast flashing status. At this time all the memory data is cleared, the cleaned remote control will not have lighting LED indicator no matter which button you press. 2. Copy method One hand keeps the original remote controller, while another keeps the copy remote control, the two remote controls should be placed as closely as possible (the ideal situation is to put the two remote controls on the desktop side by side with zero distance), respectively press down the copy button, when the LED indicator light flashes quickly after three flashes, this copy is successful, other key operating methods are the same. Some remote control has a smaller transmitting power, so the original remote control should be placed back to the copy remote control to be operated. For the presence of noise, it should avoid interference to operate, If the copy is not successful, it should recopy after clearing code. Pls clear the testing code before copy. Press the upper 2 buttons at the same time until the LED light flashes 3 times quickly, then release any one of the buttons (the other one keep pressing), and press this button 3 times, then release both buttons after the LED light fiashes quickly. The LED light doesn't turn on when you press any button, that means you' ve removed the code. Studying Code. Press and hold one button on this remote, and also the same on your remote controller, make them close to receive the signal 3 seconds, LED light will quickly flash and then always on, then release the button . Try to press this button, LED light will be on, that means you have copied successfully. Do the same steps to other buttons. Recovery function. If you delete the useful codes accidently, you can press the 3& 4th buttons at the same time until the LED light flashes quickly 3 times then recover successfully. Easy to use, the 4 channel remote control system lets you take control of your gadgets, car, home and garage. This is not a complete list! If your remote uses the 433MHZ frequency it will work with the remote duplicator (note: rolling code remotes will not work). IC model of original remote control is 2262 2260 1527 2240 and compatible IC. The battery used in the product is 27A 12V please replace the battery when the remote control distance is insufficient. Clone up to 4 remote signals from 4 different remotes. With this remote control, you can control all 433MHz fixed code key fobs. Some remotes that use this frequency are listed below. 4-Channel RF Wireless Remote Control Duplicator for Cars, Garage Doors, Gate Doors, Alarm Systems etc.