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
P4SM2 is PCIe x4 adapter from M.2 Socket 3. This module allows you connect any PCIe device to M.2 slot through a standard PCIe x4 port and power cables.
P4SM2 supports M.2 socket 3 with TYPE 2260/2280-D2-M of PCIe SSD.
P4SM2 also support 12V power by 4pin FDD power connector for Standard PCIe device.