Specifications:Type: Remote Control Hardware: Plastic, AlloyButton: 4 buttonsFrequency: 433MHzThe latest IC programming code to prevent accidental removal.4 channel radio control machine for cars, car roofs, garage doors, gate doors, alarm systems, heating systems, home automation, etc. % fixed code and common learning remote controls. Clones up to 2 remote signals from 2 different remotes. How to program: 1. Remove historical code from duplicators. Press buttons A and B continuously until the indicator flashes 3 times. Leave button B (hold button A) and slowly press button B for 3 times, the indicator light flashes. Leave the A key to clear the code authorization. If the code authorization is correct, short press any key. The light will not flash. If the light flashes, short press any button release process is done wrong. Please try the sharing process again.2. Copy the original station code. Place the cloning remote and the original remote next to each other. Make sure they touch each other. Press and hold one button on the original remote and one of the buttons on the clone remote until the remote flashes the clone LED constantly. The blue LED flashes 3 times quickly, then stops for one second. , then flashes regularly. Release both buttons. Programming is successful. Copy the other buttons in the same way. Package includes 2x key fob (battery not included)