Compatible with any 315 MHz garage door opener featuring a purple learn button. This keyless entry remote uses a personalized 4-digit password with up to 10,000 possible combinations that you can change anytime. Temporary passwords can be set for visitors or service personnel with limits on hours or number of entries. Rolling code technology generates over 100 billion unique codes with each use while your password remains constant, ensuring secure operation when the password and ENTER button are pressed.