O/A 3.8 IN. LG; OPER PWR RQMT DC 17 TO 29V; M54 TO P125 DEG C; 200 TO 300 HZ AUDIO RANGE; CONT SIG DY CYCLE; 4 HZ PORM 10 PCT TO 6 HZ PORM 10 PCT INTERRUPTION RATE; HERMETICALLY SEALED; 1 CONNECTOR RECEPTACLE TYPE TERMINAL MIL P/N MS3106A16S1P; HOLE MTD TYPE 4 0.173 IN. DIA MTG HOLES ON 1.921 BY 2.125 IN. MTG CTR