Sonnet USB 3.0 ExpressCard/34 (2-ports, Macintosh/Windows) USB3-2PMA-E34 Powered ports support bus-powered drives Transfers data up to 10x faster than over USB 2.0 connections Simple way to add two SuperSpeed USB 3.0 ports to a MacBook Pro or PC notebook computer with ExpressCard/34 slot Supports hot-swappable device connection-plug in and disconnect peripherals without shutting off your computer Simple way to add two SuperSpeed USB 3.0 ports to a MacBook Pro or PC notebook computer with ExpressCard/34 slot Transfers data up to 10x faster than over USB 2.0 connections Supports hot-swappable device connection-plug in and disconnect peripherals without shutting off your computer Powered ports support bus-powered drives