Internal Host interface: PCIe Output interface: M.2, SATA TRIM support The AXAGON PCES-SA4M2 PCI-Express controller extends your desktop PC with two SATA III ports and two slots for SATA M.2 disks with a transmission rate up to 6Gb/s. The combination of a two-port SATA III controller and two SATA M.2 slots makes the card a very useful device for expanding your computer. You can easily connect up to four disks, such as two 3.5" disks or optical drives and two SATA M.2 disks.The card equipped with ASMedia chipset not only supports SATA 3.0 specification, but also other SATA technologies such as Hot-Plug, Native Command Queue (NCQ), TRIM, or Port Multiplier. Easy installation without the need to install drivers on most operating systems. Included low profile bracket allow controller installation into standard and also low profile PC cases.Input:PCI-Express 3.0 interface, compatible with PCI-Express 1.0a / 1.1 / 2.0 /2.1.Number of 2-Lane (x2) lines, compatible with x4 / x8 / x16 PCIe