Multi card reader
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A multi card reader is a device used for communication with more than one type of flash memory card. Multi card readers do not have any built-in memory capacity, but are able to accept multiple types and styles of memory cards. Multi card readers typically use a USB interface to connect with a USB-capable computer or other device, enabling users to access information stored in the memory card. The number of compatible memory cards varies from reader to reader and can include more than 20 different types. The number of different memory cards that a multi card reader can accept is expressed as x-in-1, with x being the number of memory cards accepted. Such as 35-in-1.
There are three categories of card readers sorted by the type and quantity of the card slots: single card reader (e.g. 1x SD-only), multi card reader (e.g. 9-in-1) and series card reader (e.g. 4x SD only).