Model: NST-400MX-S3R Device Support: SATA I/II/III Hard Drives Device Size: 2 bay for 3.5" HDD Internal Interface: SATA External Interface: USB 3.0 & eSATA HDD Capacity: 10TB* per bay, Up To 20TB total Power Supply: AC Adapter Fan: 50x50x10mm Material: Aluminum & Plastic Dimension: 197 x 123 x 72 mm USB Cable Length: 914mm (36 inches) *Current shipping product supports. System Requirements: Microsoft Windows XP/Vista/7/8/8.1/10 Mac OS X 10.4 or newer For USB 3.0 Speeds, System Must Support USB 3.0 Specification For eSATA Speeds, System Must Support eSATA Specifications For eSATA, System Must Support Port Multiplier NexStar MX ,Power Adapter ,USB 3.0 Cable ,eSATA Cable ,User"s Manual