LiftMaster LOOPDETLM Plug-In Loop Detector, Rev 4.6 firmware (with 3 tracking settings). Genuine LiftMaster gate loop detector — plug-in connector, no wiring needed. 8 sensitivity settings, boost switch, test/prog dial. Compatible with LiftMaster CSW24U, CSL24U, RSL12U, RSW12U, LA400U/412U/500U, CSW200U, SL3000U, SL585U, SL595U gate operators. Item is new/unused, comes with original box and instruction manual.