Transducer Ultrasonic 25khz 4 pieces MK-109C 349 25 DIA X 20 MM dog collar frequ for Sale

Transducer Ultrasonic 25khz 4 pieces MK-109C 349 25 DIA X 20 MM dog collar frequ For Sale

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Transducer Ultrasonic 25khz 4 pieces MK-109C 349 25 DIA X 20 MM dog collar frequ:
$12.00

HELLO ERS , UP FOR "BUY IT NOW " ARE ULTRASONIC TRANSDUCERS MADE BY MASSA ,,, THESE ARE NEW OLD STOCK NOT USED,, YOU ARE BUYING IT NOW FOR 4 PCS,,, FREE GROUND SHIPPING IN USA . WE DON'T KNOW WHAT THE FREQUENCY IS FOR SURE , WE THINK THEY ARE about 25khz a customer found some info and got back to usEXCITATION FREQ. 26.3 KHZ; MIN. BEAM WIDTH 40 DEG. AT 3 DB POINTS; WAVEFORM SQUAREWAVE; MIN. ACOUSTIC OUTPUT P 26 DB 1 MICRO BAR AT 1 FT; OPERATING TEMP. RANGE M 30 DEG. C TO P 66 DEG. C; O/A BODY DIM. 1.0 IN. DIA.; 1.06 IN. L; (1) CONNECTOR RECIPROCAL TERM; COGNIZANT SERVICE:NAVYTHERE IS A 349 STAMPED ON THE BACK OF THE TRANSDUCER AND ON THE BOX THEY CAME FROM IT SAYS MK-109C 42A THEY MEASURE 25MM IN DIA AND 20 HEIGHT NOT INCLUDING THE RCA PHONO FEMALE CONNECTOR THEY WERE MADE IN USA IN 280 LINCOLN STR HINGHAM , MASS .... these transducers might be able to work with dog hearing frequencies as the 25khz range is out of the human hearing range but dogs do hear in the upper frequencies. THANK YOU FOR READING AND MESSAGE ME IF YOU HAVE ANY MORE QUESTIONS ...