The ONE M.2 expansion board extends support for SATA M.2 SSDs to maximize the actual potential speeds of your 4. Now you can through a SATA M.2 SSD for time and higher storage capacity compared to microSD card.To use it, you just need to replace the bottom of the with the expansion board, and the case can now use SSD. Using 4 cases is recommended due to the USB 3.0 ports provided by the boards. ONE M.2 supports UASP for 4, which means that you can maximize the transfer speeds of your SATA M.2 drive.It is compatible with any M.2 SATA SSD with Key-B and Key B & M. (not for NVME)colour: blackMaterial: aluminum alloyPackage Contents:1 x M.2 expansion board1 x USB 3.0 adapter4 x non-slip gaskets4 x screwsOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.