Garage door remote control 4 buttons, which allow you to program for 4 different channels. With this remote control, you can copy the remote control if you want to replace it (e.g. due to damage), or if you want to create more copies (e.g. for other family members). This specific remote control uses fixed encoding, meaning it operates once with a code, which on one hand makes it more vulnerable to theft (i.e. someone else copying the code), but on the other hand, it is much easier for you to copy in case you want to replace it or create copies.