Atech Flash Technology Blackbird CX-2 Dual CFast 2.0 USB 3.0 Reader Writer for 4K Workflow. Supports Cfast & Cfast 2.0 cards. Ideal for Blackmagic URSA, ARRI ALEXA. SuperSpeed USB 3.0 specifications Dual CFast 2.0 card slots to increase workflow Fits into standard 5.25" drive bay Professional Industrial designed housing for durability External use with USB 3.0 Cables (sold separately)