Skylink MK-1 Universal Garage Door Remote Control Kit Easy Clip included for Simple One-Step Installation. Universal Smartbutton is compatible with most national brand Garage Door Openers. Operate multiple garage door openers with the same remote control by adding additional Smartbutton (GB-318) or add additional remote controls for other members of the family. Optional Passcode Protection as an advanced security feature. Compact keychain size or visor mount (clip included)