Hardware Compatibility:Echo Express SE I Expansion System (Thunderbolt 2 Edition) External Connectors:Two Thunderbolt 3 (USB-C) ports Mac Compatibility:All Upgrade Card ModelsMac with Thunderbolt 3 ports Macs with Thunderbolt 2 or Thunderbolt ports with the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 AdaptermacOS 10.12.1+ PC Compatibility:BRD-UGRTB3-SEL, BRD-UPGTB3-SE1PC with a Thunderbolt 3Windows 10, 8, 7 Operating Temperature:0 to 35 deg. C (32 to 95 deg. F) RoHS Compliant:Yes