It could read and write on two cards simultaneously to keep you away from the hassle of constant unplugging and re-plugging.
Super Speed & High Capacity: Supports up to 256G SD/Micro SD card read and super speed up to 5Gbps - 10X faster than USB 2.0 (480 Mbps),
Easy Installation: plug and play, no driver needed on the compatible devices. Portable Kit: with slim and sleek design, this tiny usb card reader is a great kit for travel.
For the USB 3.0 connection, compatible with Windows XP/Vista/7/8/8.1/10, Mac OS, Linux, Chrome OS. For the OTG connection, compatible with Samsung Galaxy or Note series phones and tablets, Google Nexus series, Dell, Motorala, Sony, Nokia, Lenovo yoga/ThinkPad, Acer tab, HTC and more.