Key Features Designed for super-fast SD UHS-II card transfers Compact, portable SD card reader, no cables required Compatible with USB (Universal Serial Bus) 3.0 & backward-compatible to USB (Universal Serial Bus) 2.0 Compatible with UHS-II, backwardscompatible with UHS-I & non-UHS SD cards The San Disk Extreme PRO SD UHS-II Card Reader/ Writer is designed to increase workflow efficiency for professional photographers & videographers. Small enough for fieldwork, the compact reader is built to handle the high-performance demands of UHS-II card technology & offers support for fast transfer speeds. With a USB (Universal Serial Bus) 3.0 interface (and backwards-compatible with USB (Universal Serial Bus) 2.0), the San Disk Extreme PRO SD UHS-II reader/writer is your best choice for performance & efficiency when paired with a SD UHS-II memory card.