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About product and suppliers:
        Alibaba.com offers 552 key usb serial products. About 42% of these are pos systems, 2% are integrated circuits, and 1% are printers. 

A wide variety of key usb serial options are available to you, such as camera, mp3 / mp4 player. You can also choose from paid samples, free samples. 

There are 554 key usb serial suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and United States, which supply 99%, 1%, and 1% of key usb serial respectively. 

Key usb serial products are most popular in North America, Southeast Asia, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 177 with Other, 81 with ISO9001, and 9 with ISO14001 certification.