LIFTMASTER Garage Door Openers 412HM Receiver 12/24 Volt 390MHz The receiver can be powered with either 24V AC/DC or with 12V DC. The jumper must be in the 24V position for use with 24V, and in 12V position for use with 12V DC. The jumper must be set to the proper voltage to avoid damage to the receiver. The 412HM Universal Receiver can be used with up to 15 rolling code transmitters or passwords in HIGH security mode. Alternately, it can be used with up to 31 of any type LiftMaster/Chamberlain (390Mhz) transmitter in NORMAL security mode, including any combination of rolling code, billion code, or dip switch remote. Includes receiver, antenna wire and instructions. 390MHz Frequency. Does not include optional 24 volt power supply 85LM. Accessory Transmitters - Series 50, 60, 80 and 900.