M.2 stands for Next Generation Form Factor which is invented for PCI-SIG by Intel and it is developed for flat and high-efficiency equipment such as Ultrabook or Tablet PCs. It is a natural transition from the Mini Card and Half Mini Card to a smaller form factor in both size and volume which supports multiple function add-in cards/modules including: Wi-Fi, Bluetooth, global navigation satellite systems, near field communication, Hybrid digital radio, wireless gigabit alliance (WiGig), wireless wide area network and solid-state storage devices. Also adds functionality to USB 3.0, display Port, SDIO and SSD-PCIe.
Function:
Allows users to use standard PCI-e 4x SSD in M.2 NGFF M key slot in the Desktop or outside laptop. Transparent to the operating system and does not require any software drivers.

Specifications:
PCI-e 4X to M.2 NGFF adapter.
M.2 Specification Revision 0.9-3
Serial ATA Spec. Reversion 3.2
Support 2260/2280 type M.2 SSD module slot.
Only Support M.2 Socket 3 PCI-e-based slot.
FPC cable length: 20 cms