LiftMaster 312HM Universal Coaxial Receiver;

Liftmaster 312HM receiver is suitable for 1 automatic gate or garage door opening application. Includes rolling code technology. This unit is FCC certifies at 315MHz and works with all Liftmaster Security+ remote control transmitters. Can be paired with Wireless Keypad WKP250LM. FEATURES: External 8" whip antenna included Security+ Rolling code technology 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