Description External 8' whip antenna included. Enhanced Radio TechnologyTM rolling code and/or DIP switch compatibility 12 volt DC or 18 - 35 volts AC/DC jumper selectable Momentary or constant contact, jumper selection Two-piece aluminum case with detachable cover High security memory stores up to 18 Enhanced Radio Technology™ remote controls or keyless entry codes Normal security memory stores up to 31 remote control codes of any type 315MHz 3-year warranty