MegaCode transmitters and receivers by Linear work with all of Linear's access control products and are particularly well suited to commercial and industrial applications. Under the MegaCode format, each transmitter is preprogrammed at the factory with one of more than one million codes and the system prevents unauthorized reprogramming of a transmitter. Choose from convenient keychain size transmitters or visor style transmitters with one, two, three or five channels. Wireless keypads also provide another entry option. Along with this selection of transmitters, North Shore Commercial Door carries a matching selection of Linear MegaCode receivers for operating gates or garage doors.