433 MHz 2-pack universal replacement remote controls for electric garage doors

Four buttons can each copy four different types of chips, and one remote control can operate four types of installations, helping you save a lot of money. Using radio frequency technology, the transmission distance is long, non-directional, high transmission sensitivity, and no signal interference. 433 MHz, transmission distance 50-100 m (open space), giving you a new remote control experience and bringing more convenience to your daily life. High copy accuracy, high copy efficiency, easy to install and operate. 4-channel radio-controlled device for cars, roofs, garage doors, gates, alarm systems, heating systems, home automation, and more.