Four buttons can each copy four different chip types, and one remote control can control four types of structures, saving you a lot of money. By adopting radio frequency technology, the transmission distance is long, non-directional, with high transmission sensitivity and no signal interference. 433 MHz, transmission distance 50-100 m (in open space) offers you a new remote control experience and more convenience in your daily life. High copy accuracy, high copy efficiency, easy to install and use. 4-channel radio control for cars, roofs, garage doors, gates, alarm systems, heating systems, home automation, and more.