Lexar LRW450UBNA Overview The Multi-Card 2-in-1 USB 3.0 Reader from Lexar enables high-speed transfers from card to computer or between two cards. Built with dedicated UHS-II SDXC and UHS-II microSDXC card slots, this reader supports transfers of up to 312 MB/s. If you’re working with UHS-I media, transfers max out around 170 MB/s. Both card slots may be used simultaneously, and this reader connects to your host system using an integrated USB 3.0 Type-A port that is backward compatible with USB 2.0. The Speed to Quickly Transfer Files for an Improved Workflow The Lexar Multi-Card 2-in-1 Card Reader offers transfer speeds of up to 312 MB/s for SD and microSD media. It’s also backwards compatible with UHS-I at speeds up to 170 MB/s to improve your workflow. Save Time with Concurrent File Transfers This reader has the ability read from both card slots simultaneously. It also allows for file transfers from one card to the other, helping to further enhance its versatility. Compatible with USB 3.0 and 2.0 Ports Designed with a USB 3.0 Type-A interface, Lexar’s 2-in-1 reader is also compatible with USB 2.0 ports.