1. Super-fast speed amp; 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 amp; 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 / Micro SDXC / Micro SDHC / UHS-I cards. 4. Compact and travel-friendly? Small enough for field work, the card reader / writer has a compact design that makes it easy to take with you wherever you go. Plug and Play: No drive required. No additional power supply required. 5. Universal compatibility? The USB 3.0 A connector can be used with all desktops / laptops / PS4 / Xbox One / Smart TV devices with USB A connector. The USB-C port is compatible with USB C / Thunderbolt 3 laptops such as MacBook Pro, MacBook Air, Dell XPS15 13, HP Specter X360, Lenovo Yoga series and OTG-compatible Android smartphones / tablets such as Samsung Galaxy S10 / S9 / S8 / Note 8 / A8 / Tab S4.