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Ultrasonic Directive Speaker
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Ultrasonic Directive Speaker Features
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ultrasonic
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directive
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speaker
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parametric
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transducer
About Ultrasonic Directive Speaker
you can enjoy sound beam. you need 15V to 24V DC adapter. adapter jack size=5.5mm, inner 2.1mm. you need 3.5mm phone cable for sound source. R3=volume,R12=frequency,R2=pulse wide. pre-set in shipping. short demo https://youtu.be/n_MTsnrv0xE
