This product only supports 2230 2242 size M.2 NGFF interface with PCIE x4 AHCI or NVMe transfer protocol solid state drive (solid state drive has only one space) and 2230 2242 size PCIE x2 AHCI or NVMe transfer protocol solid state drive (such solid state drive There are two interfaces, but the transmission protocol is NVMe or AHCI. Note that some solid-state drives have two spaces but the transmission protocol is SATA. This SATA protocol cannot be used. Item Type: Adapter Card Colour:black Material:PCB Package Contents: 2 x NVMe SSD to A1708 SSD Adapter Card Kind Tips:This adapter only supports the installation of for OS , or later versions of systems, and does not support the installation of systems lower than version 10.14, because the integrated NVMe driver of the low version system cannot recognize most NVMe SSD. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 2. Only Supports 2230/2242 type Key-M NVME M.2 SSD, does not supports SATA bus key +M SSD 3. No soft driver required 1. This adapter is only suitable for 2016 2017 pro A1708 model 4. No additional power required