The Lexar Professional Multi-Card 3-In-1 USB 3.1 reader uses fast USB 3.1 technology to provide you with high-speed transfer of your HD videos, photos, music and other files, directly from your card to your computer. With read speeds up to 5 times faster than older USB 2.0 technology, its USB 3.1 interface provides transfer speeds up to 312MB/second for SD and microSD cards, plus up to 160MB/second for CompactFlash cards.It's easy to use! Just slide your flash card into the reader, then drag and drop files onto your computer. It's also backwards-compatible with SD UHS-I cards, as well as USB 2.0.The Lexar Professional Multi-Card 3-In-1 USB 3.1 reader can also read multiple cards from multiple card slots simultaneously, so you can transfer files card-to-card.(Cards sold separately.)