Liftmaster 412HM Receiver;

Liftmaster 412HM Receiver is a Universal coaxial receiver that features Security+ 4 wire connection, plus 8" external whip antenna, ideal for 12VDC operations. Will work with ALL 390mhz Lift-Master, Sears or Chamberlain remotes with 390mhz frequency. FEATURES: External 8" whip antenna included Billion Code technology and dip switch compatibility 12V DC or 18-35V AC/DC, jumper selectable 2-piece aluminum case with detachable cover High security memory stores up to 15 Security+ remote control or keyless entry codes Normal security memory stores up to 31 LiftMaster remote codes of any type 3 year warranty