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6khz piezo buzzer pin type buzzer 22mm 6V 90dB piezo alarm security buzzer 1. Dongguan Sweetsound Electronics Company Limited,a Hong Kong independently owned company,was established in 1991,Sweetsound is a professional enterprise to research,produce and sell various piezoelectric elements,piezoelectric sounders,piezoelectric ultrasonic tranducers and piezoelectric horns,electro …
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