"CONSISTS OF FRAME HOLDING PRINTED WIRING BOARD WITH CONNECTOR,ELECTRICAL,RECEPTACLE; 2 CAPACTTORS,FIXED,ELECTROLYTIC; 1 CAPACITOR,FIXED,CERAMIC DIELECTRIC; 2 MICROCIRCUITS,DIGITAL; 2 KEYING PINS,ONE WITH 90-DEG CUTOUT FROM UPPER LEFT QUADRANT OF PIN,ONE D-SHAPED WITH FLAT SIDE VERTICAL AND FACING RIGHT; PROGRAMMED TO TRUTH TABLE 77A102655"