Stinger 390LMD21V garage door opener visor sized remote is a 9 dip switch, 390 MHz remote that is compatible with LiftMaster.

• 9 dip switch style LIFTMASTER, sears craftsman 390mhz only remote. Covers chamberlain brand dip switch style remotes from 1984 to 1993
• Operates with LiftMaster receivers and transmitters
• Test/operate LED
• Visor clip included
• Blue case
• Power: Long-life 12 V battery
• Frequency: 390 MHz