Description Liftmaster 423LM 390 mhz Liftmaster Receiver 3 channel Receiver 390 mhzFor use as 3 button station with Open/Close/Stop buttons. Must be used with 33lm remotes. Liftmaster 423LM Programming Instructions (click here)
Quick view Liftmaster Liftmaster 41DB002-2-390 Alt frequency board (390 MHz) (not shown) [041DB002-2-390] [NO LONGER AVAILABLE] $237.13