Sedna PCI Express (PCIe) Dual 2.5 Inch SATA III (6G) SSD Adapter (Extended Single Side SSD Version) (with Built in Power Circuit, no Need SATA Power Connector, Best for Mac), SSD/HDD not Included
Brand: Sedna
Features :

Direct mounting of two 2.5" SATA III SSd / Hdd on board (SSD not included)
Operating System Software can be installed on mounted SSD and booting of the OS from the installed PCIE disk is supported (Your mother board BIOS need to support this feature)

Using standard low cost high perfermance 2.5" SSD instead of the much more expansive mSATA SSD Built in Power circuit, no power connection required. Best for PC / MAC where no extra power connection available
Can be used for installion of VMWare ESXI 5.5 as boot disk (need to inject sata-xahci-1.10-1.x86_64.vib to ESXI installation ISO file)

Specifications :

PCIE 2 Port SATA III (6G) Port
Support direct installation of two standard 2.5" SATA III SSD
PCI Express Specification Rev. 2.0
1-Lane (x1) PCI-Express with transfer rate 5Gb/s Full Duplex channel
Compliant with Serial ATA 3.0 Specification,Data transfer rate up to 6.0Gb/s
Backward compatible with SATA1.0/SATA2.0 specification
Maximum capacity supported : 4T Tested
Support NCQ
Driver supported Windows98SE /ME/ 2000/XP/Server 2003/Vista/WIN7/Win8/Win 8.1/ Win 10, Mac OS
Dimension : 20 x 120 x 230 mm

System Requirement :
Available PCIE 2.0 1X,2X,4X,8X or 16X slot on PC
Supported OS

Package Content :
PCIE SATA III SSD adapter
Driver CD
8 x Hdd mounting screw
(SSD / HDD in photo is not included)
1 x screw driver
Direct mounting of two 2.5" SATA III SSd / Hdd on board
Built in Power circuit, best for PC / MAC where no power connector available
Operating System Software can be installed on mounted SSD and booting of the OS from the installed PCIE disk is supported ( Your mother board BIOS need to support this feature )
Maximum capacity supported : 6T Tested
No hardware RAID support