Speedy quick file transfers from UHS-II type SD cards at the cards’ maximum speed. This is especially helpful for video files and large RAW files. Even if a UHS-II SD card was used in a non-UHSII camera, it can still download the files to a computer at UHS-II speeds using the 7824 reader! - High-grade aluminum housing construction for maximum durability. Industrial grade internal components for maximum performance. Use an SD card to backup files from a microSD card or visa-versa. Think of all those drone customers with microSD cards that need to be backed up. - 2-lun chip design allows the reader to read and write back and forth between an SD and a microSD card simultaneously. - Fully USB 3.0 compatible with the newest computers for maximum transfer speed. *Note: SD slot is UHS-II. MicroSD slot is UHS-I.