Liftmaster RSL12U/RSW12U AND CSW24U/CSL24U units.
Backwards compatible for older second generation DC units bit will require monitored safety edge or safety eyes.
Note: When upgrading older CSL24V and CSW24V units use upgrade kit K76-38252
which includes this board,expansion board and wire harness.
Easy to install and upgraded my CSL24V with no issues.
Excellent Service - Delivered next day, as promised!!