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MiniSD memory card slots can be found in most smartphones that are available in the market today, making them the de facto standard when it comes to flash memory for such devices. Finding a compatible memory card reader is not hard, but getting one that looks extremely good and yet comes with pretty good performance figures is another story altogether. Alfa Media decided that they should fill this niche and proudly introduces the Alfa Media MNCR which is touted to be the smallest MiniSD card reader in the world. It measures 24mm x 21.5mm x 2.4mm, which is slight bigger than the card itself. You connect the Alfa Media MNCR into any available USB 2.0 port in order to begin transferring your data. This MNCR is capable of reaching data transfer rates of up to 26MB/s, depending on the type of MiniSD card used. This plug-and-play device is compatible with both Windows and Mac platforms. There is currently no word with regard to pricing and availability. Butterfingers ought to take extra caution when handling the MNCR as it can get lost rather easily, no thanks to its extremely small size.

Pros : Very portable
Cons : Extremely small size makes it easy to get lost

World's smallest MiniSD card reader Source