"CONSISTS OF FRAME HOLDING PRINTED WIRING BOARD WITH ONE CONNECTOR,ELECTRICAL,RECEPTACLE; TWO CAPACITORS,FIXED,ELECTROLYTIC; ONE CAPACITOR,FIXED,CERAMIC DIELECTRIC; TWO MICROCIRCUITS,DIGITAL; TWO KEYING PINS,ONE WITH 90 DEG CUTOUT FACING DOWN,ONE D-SHAPED WITH FLAT SIDE TO RIGHT; PROGRAMMED BY TRUTH TABLE 77A102039"