Startech.Com USB 3.0 / eSATA Dual-Bay Trayless 3.5" SATA III Hard Drive Enclosure with UASP - 2-Bay SATA 6 Gbps Hot-Swap HDD Enclosure - 2 x HDD Supported - 8 TB Supported HDD Capacity - Serial ATA/600 Controller - RAID Supported 0, 1, Concatenation,

StarTech.com USB 3.0 / eSATA Dual-Bay Trayless 3.5" SATA III Hard Drive Enclosure with UASP - 2-Bay SATA 6 Gbps Hot-Swap HDD Enclosure - 2 x HDD Supported - 8 TB Supported HDD Capacity - Serial ATA/600 Controller - RAID Supported 0, 1, Concatenation, JBOD, 1, JBOD - 2 x Total Bays - 2 x 3.5" Bay - 1 USB Port(s) - 1 USB 3.0 Port(s) - Desktop - RoHS Compliance

The S352BU33RER 2-Bay RAID enclosure lets you build an external RAID array with two 3.5" SATA hard drives, and connect to your computer through USB 3.0 or eSATA. For fast performance and efficient data transfers, the enclosure supports SATA III transfer speeds -- up to 6 Gbps when connected through eSATA. The versatile RAID enclosure can also be connected through USB 3.0, with support for UASP, performing up to 70% faster than conventional USB 3.0 when paired with a UASP-enabled host controller. See our UASP testing results below for further details. The external RAID enclosure features a hardware RAID controller, supporting JBOD, Spanning, RAID 0, and RAID 1 -- to achieve greater drive capacity, or secure data redundancy. The RAID controller is also front mounted for ease of access when changing your RAID mode. For fast and easy drive installation and removal, the dual drive enclosure features a convenient trayless system that eliminates having to mount and fasten your drives, saving time and hassle. To ensure compatibility with your computer system, the S352BU33RER supports all of the leading operating systems, including: Microsoft Windows® (8/7/Vista/XP/Server 2008/Server 2003), Apple® OSX (10.9/10.8/10.7/10.6), Linux, and Google Chrome OS™. The S352BU33RER is backed by a StarTech.com 2-year warranty and free lifetime technical support. Improved Performance with UASP UASP is supported in Windows 8, Mac OSX (10.8 or above), and Linux. In testing, UASP performs with a 70% faster read speed and 40% faster write speed over traditional USB 3.0 at peak performance. At the same peak in testing UASP also shows an 80% reduction in required processor resources. Testing results were obtained using an Intel® Ivy Bridge system, a UASP-enabled StarTech.com Enclosure, and a SATA III solid state drive. More from the Manufacturer

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Technical Specifications:
Number of Hard Drives Supported: 2
Total Hard Drive Capacity Supported: 8 TB
Number of Total Expansion Bays: 2
Number of 3.5" Bays: 2
Controller Type: Serial ATA/600
RAID Supported: Yes
RAID Levels: 0, 1, Concatenation, JBOD, 1, JBOD
Host Interface: USB 3.0 Type B, eSATA
Total Number of USB Ports: 1
Number of USB 3.0 Ports: 1
Input Voltage: 120 V AC, 230 V AC
Power Source: AC Adapter
Height: 4.6"
Width: 5.1"
Depth: 8.5"
Form Factor: Desktop
Weight (Approximate): 4.10 lb
Package Contents:

USB 3.0/eSATA Dual 3.5" SATA HDD Trayless Enclosure, 1 x eSATA Cable, 1 x USB 3.0 Cable, 2 x Drive Bay Keys, 1 x Universal Power Adapter, 1 x Instruction Manual

Certifications & Standards: CE, FCC
Platform Supported: PC, Mac
Environmentally Friendly: Yes
Environmental Certification: RoHS, WEEE, REACH
Country of Origin: China