Audiovox Part Numbers: APS2K4SFLCF, APS2K4SFLCF110P, APS2K4SCF50P, APS2K4SBCF50, APS2K4SBCF52P, APS2K4SBCF52, and APS2K4SFLCF112P. Basically any part number that starts with APS2K4S... is compatible. The FCC ID on this remote can be ELVATOC or ELVATOD or ELVATOH. The circuit board ID is either ADTH, ATDH, and ATFF.) This remote's Frequency is 434 MHz. The LED color is Red. This remote has 4 buttons on front (some have one on the side.) This remote works on these Prestige Systems: APS55C, APS55LRA, APS55TW, APS55TWT, APS686T, APS686TC, APS410A, APS510A, APS510B, APS511C, APS590, APS596, APS596A, APS610A, APS610C, APS687N, APS786, APS787N, APS997N. Battery, programming instructions and tech support are included with the purchase.