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About product and suppliers:
        Alibaba.com offers 26,544 frequency device products. About 18% of these are multi-functional beauty equipment, 5% are physical therapy equipments, and 1% are testing equipment. 

A wide variety of frequency device options are available to you, such as free samples, paid samples. 

There are 26,714 frequency device suppliers, mainly located in Asia. The top supplying countries are China (Mainland), South Korea, and Estonia, which supply 99%, 1%, and 1% of frequency device respectively. 

Frequency device products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 5,939 with Other, 5,045 with ISO9001, and 2,378 with ISO13485 certification.
        
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