This product is a CFast/SD/TF three-card slot card reader that supports reading and writing CFast series memory cards, SD series memory cards, and TF series memory cards. With this product, you can easily read and write data from SD cards, TF cards (Micro SD), and CFast cards on laptop computers and other devices with a USB-C interface. The device supports SD/SDHC cards in the SD card slot, and TF supports Micro SD/SDHC/MMC/RS-MMC/UHS-I cards. You can use either a CFast card, SD card, or TF card to copy data with dual drive letters, ensuring seamless compatibility with Windows 11/10/8.1/8/7/XP/Vista, Mac OS, Linux, Chrome OS, and other operating systems. This card reader features an ultra-thin, palm-sized design for maximum portability while traveling.