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About product and suppliers:
        Alibaba.com offers 2,036 headphone unit products. About 1% of these are supermarket shelves, 1% are dental chair, and 1% are switching power supply. 

A wide variety of headphone unit options are available to you, such as single-sided, double-sided. You can also choose from plastic, paper, and metal. As well as from free samples, paid samples. 

There are 2,036 headphone unit suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of headphone unit respectively. 

Headphone unit products are most popular in North America, Western Europe, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 757 with ISO9001, 261 with Other, and 33 with ISO14001 certification.
        
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