Description: Wide application: This 4-key remote control for duplicator is widely used in a garage door controller, gate controller, car door controller, etc. Convenient to use: With 4 button design, this remote control copier can easily copy the function of another 4-key remote control. Portable: With a metal buckle, you can easily carry this remote control for duplicator with you when you're out. Safe to use: This remote control copying device is designed with a button slide cover which makes the buttons not easy to be damaged. Long range: This gate opener copier has a long control distance, and is up to 100 meters. Specification: Color: Black and Silver. Size(LxWxH): Approx. 5.5x3x1.3cm/2.17x1.18x0.51 inch. Operating frequency: 433-434 MHz. Distance: Up to 100 meters/328.08 ft. How to copy: 1. Press the two top buttons until the LED flashes - it takes around 3 seconds. 2. Place the for duplicator remote and the existing remote close together/side by side so that they are touching. 3. Press a button on your existing remote at the same time and one of the buttons on the clone remote and hold until the LED on the for duplicator remote flashes steadily. (The Blue LED will first flash 3 times quickly, then stops for a second, then flashes steadily for successful cloning). 4. Now programming is successful. If you want to program more buttons just repeat steps 2 > 4. It's that easy. To reset the remote simply start again with step 1. Note: There might be a bit of color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 4 options for you as bellow： 3Set : 3 set of 1 Piece Remote Control Copier. 5Set : 5 set of 1 Piece Remote Control Copier. 2Set : 2 set of 1 Piece Remote Control Copier. 1Set : 1 set of 1 Piece Remote Control Copier.