General description The 2 pieces universal replacement remote controls for electric garage doors operate at a frequency of 433 MHz. Designed to copy four different types of chips, these remotes can serve multiple installations, providing a cost-effective solution for your remote control needs. With high sensitivity transmission and no signal blocking, they offer a reliable performance. Technical specifications Frequency: 433 MHz Transmission distance: 50-100 m (open space) Channels: 4 Usage Compatible with cars Garage doors Gate doors Alarm systems Heating systems Home automation systems