The LiftMaster 387LM Wireless Universal Keyless Entry provides convenient keypad access to compatible garage door openers and gate operators without the need for a remote control or physical key. It uses rolling code technology to help provide secure access and features simple wireless installation and programming. The durable weather-resistant design is suitable for everyday residential or commercial use. The 387LM is compatible with many major brands, including Genie, Linear/Moore-O-Matic, Stanley, Overhead Door, Wayne Dalton, Craftsman, Chamberlain, and LiftMaster. It is not compatible with Marantec, Hormann, or Napoleon Lynx openers. The keypad is powered by one 9V battery, which is included.