Description: Universal cloning electric gate garage door remote control key fob. 4-Channel RF Wireless Remote Control Duplicator for Cars, Garage Doors, Gate Doors, Alarm Systems etc. This is a fixed frequency remote cloner (433.92mhz) for copying 99.99% common fixed and learning code remote controls. Clone up to 4 remote signals from 4 different remotes! That is a remote control can operate four different types of facilities. Duplicate Your Existing Remote Controllers so you always have a backup: 1. Vehicle central locking systems; 2. home / office / building garage doors; 3. Electronic gates; 4. Electrical appliances/Home automation i.e. lights; 5. Car sunroofs; 6. Car/Motorbike alarms. Size: 6x3x2cm / 2.4x1.2x0.8 inch 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. Code 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. Package Includes:(4 Pack) 1 Piece Garage Door Remote Control