Sonnet Allegro USB 3.0 PCIe 4-Port (Mac and Windows Compatible) Adds four USB 3.0 ports to your Mac Pro with PCIe slots, Windows PC, or Thunderbolt-to-PCIe card expansion chassis; transfers data up to 10x faster than over USB 2.0 connections Supports USB 3.0 bus-powered hard drives, SSDs, DVDs & Blu-ray devices with up to 2.0A per port Supports USB 3.0 charging port handshake, and will simultaneously synch and charge iPads and other devices that support USB 3.0 charging at 1.5A per device Plug in and disconnect peripherals without shutting off your computer Provides maximum performance over Thunderbolt