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About product and suppliers:
        Alibaba.com offers 345 micro-controller based systems products. About 1% of these are speaker. 

A wide variety of micro-controller based systems options are available to you, 

There are 345 micro-controller based systems suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of micro-controller based systems respectively. 

Micro-controller based systems products are most popular in North America, Oceania, and Eastern Asia. 

You can ensure product safety by selecting from certified suppliers, including 64 with ISO9001, 28 with Other, and 12 with ISO14001 certification.