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About product and suppliers:
        Alibaba.com offers 1,389 otg mobile card reader products. About 44% of these are card reader, 9% are usb flash drives, and 7% are pos systems. 

A wide variety of otg mobile card reader options are available to you, such as sd card, cf card, and memory stick card. You can also choose from single, all in 1 / multi in 1. As well as from external, internal. And whether otg mobile card reader is usb, or expresscard slot. 

There are 1,315 otg mobile card reader suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 98%, 1%, and 1% of otg mobile card reader respectively. 

Otg mobile card reader products are most popular in North America, Western Europe, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 184 with ISO9001, 122 with Other, and 72 with ISO14001 certification.