SLK54-SX2 is a slot-in kit (upper flange and rear panel) that attaches a Wisycom receiver to a Sony camera chassis. The compatibility note states that not all Sony cameras support the internal double-pin enable for two-channel slot-in operation—confirm camera support before use. Designed for MCR54 and MCR54-DUAL, it includes the necessary mounting hardware and interface; no power or RF electronics are included.