- Sanco Electronics Co Ltd
Offers primitive buzzer such as piezo ceramic element, buzzer & transducer, siren & alarm & speakers.
http://www.sancoelectronics.com/
- Universal (Changzhou) Electronics Co Ltd
Specializes in making electromagnetic transducer, Piezo transducer, piezo element, speaker, receiver, microphone and inductor.
https://www.china-speakers-manufacturer.com/
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