PRODUCT DESCRIPTION Get the added convenience of being able to access and control your Chamberlain, Craftsman of LiftMaster Garage Door Opener without using a remote control or key. The Chamberlain 940EV Keyless Entry offers wireless installation and allows use of a 4 number pin security code to open and close your garage door. It is designed for hassle free wireless installation and programming. Includes a cover for weather protection. Seamlessly fits into any home design. FROM THE MANUFACTURER The Chamberlain keyless entry garage system allows convenient keyless access to the garage. The wireless design can be installed and programmed in minutes. Access the home with a 4-number PIN. A temporary PIN can be programmed for deliveries and guests. This system can upgrade or replace existing garage systems.