Product descriptions1. Super-fast speed & high capacity The USB 3.0 card reader from supports SD / Micro-SD cards with up to 512G and enables super-fast data transfer at up to 80-100 M / s. So you can transfer HD movies, photos or files in seconds if your host is equipped with USB 3.0. Backwards compatible with USB 2.0, 1.1 and 1.0.2. Phone & PC supported This USB A and Type C card reader offers you a simple connection between a flash memory card and a USB-A / USB-C 3 capable computer, laptop, smartphone and tablet with OTG function. Simply change your phone to a host for data synchronization. Only one for all your USB A and USB C devices.3. One reader for multi-cards The USB 3.0 SD card reader has two card slots: SD, Micro SD slots and USB A 3.0 / USB C connector, with which you can use the most common flash media on a computer, laptop or tablet USB 3.0 interface can read and transmit, including SDXC / SDHC / SD / Extreme I III SD / Ultra II-SD / MMC / RS-MMC or Micro SD / TF /