Product details:

Universal external receiver allows to add extra remote controls to any gate opener models. Using this device you can add and program up to 250 extra remote controls to your opener. Works with any garage or gate opener system. If you unable to find remote control to match your gate or door opener system, you can easily solve this problem purchasing this kit. This receiver is universal and works with any gate or garage door system. Just connect it in parallel according to the diagram and the garage door opening system will work with your existing switch/remote control as well as with new remotes.