Model: NST-272S3-BK Device Support: SATA I/II/III SSD/HDD/SDHD Device Size: 2 Bay for 2.5" 7mm and 9.5mm SSD/HDD/SDHDs Internal Interface: SATA External Interface: USB 3.0 Micro-B HDD Capacity: 2TB per bay*, for a combined total of 4TB. Power Supply: AC Adapter 5V, 2A; Micro USB to A, length: 23 inches Material: Aluminum and ABS (Plastic) Dimension: 130(L) x 83(H) x 25(W) mm Length of USB cable: 23 inches / 584mm Weight: 300g ( 10.6ozs) main unit System Requirements: Windows 7/8.1/10, MAC OS X 10.6 or above, Linux Ubuntu 10.4(Kernel 2.6.38) or above Available USB 3.0 port NexStar GX USB 3.0 Dual 2.5" SATA SSD/HDD RAID Enclosure, AC Adapter + cable (Micro USB to A), USB 3.0 Cable (USB 3.0 Micro-B to A), Set of installation Screw, Enclosure Stand, Quick Installation Guide