Effortlessly add additional SD™; microSD™; or USB storage to your Android™ 4.0 or later phone or tablet using this OTG Card Reader.fmi OTG stands for "On The Go"; which is a USB connectivity standard for Android devices. With an OTG adapter; such as this one; you can connect a variety of USB devices; such as PC keyboards; mice; flash drives; etc. This OTG adapter also includes a full-sized SD card slot and a microSD card slot; allowing you to add gigabytes of storage to your phone or tablet. The card reader connects to the Android device using a standard micro USB connection. A micro USB female to USB A male adapter is included; which allows you to plug into a PC or Mac® USB port for traditional card reader usage. Note that only one of the two card slots can be used at any given time. While you can use the USB port for an input device; such as a keyboard; simultaneously with a storage card in one of the slots; you cannot use more than one storage device (card or USB flash) at the same time when connected to an Android device. Features: Plug and play; no drivers or apps required USB 2.0 complkiant Includes both SD and microSD card slots Supports SD; SDHC™; SDXC™; microSD; microSDHC™; and microSDXC™ cards Downstream USB port can be used for USB storage devices; such as a flash drive; or USB input devices; such as a keyboard or mouse Includes micro USB port for optional external power SD; SDHC; SDXC; microSD; microSDHC; and microSDXC are all trademarks or registered trademarks of SD-3C; LLC in the United States; other countries; or both. Android is a trademark of Google Inc. Apple; iPhone; and Mac are trademarks of Apple Inc.; registered in the U.S. and other countries.