Model: NST-DP100S3 Device Support: SATA I/II/III Hard Drive Device Size: 2.5" or 3.5" Hard Drive Internal Interface: SATA External Interface: USB 3.0 (Backawards Compatible with USB 2.0 & 1.1) HD Capacity: 10TB* per bay, total capacity of 20TB* with two drives Power Supply: AC Adapter Material: Aluminum & Plastic Dimension: 150 x 108 x 61.5 mm USB Cable Length: 914 mm (36 inches) OS Support: Microsoft Windows XP/Vista/7/8/8.1/10 Mac OS X v10.6 and Up *Current shipping product supports; not Native 4K drives. System Requirements: Microsoft Windows® XP/Vista/7/8/8.1/10(32/64-bit) Mac OS 10.6 & Greater For USB 3.0 Speeds, the System Must Support USB 3.0 Specifications NexStar HDD Duplicator, USB 3.0 Cable, Power Adapter, User"s Manual