Feature: 1. This adapter card only supports 2.5-inch NVMe U.2 interface (SFF-8639 interface) SSD, and 2.5-inch protocol is definitely not supported! 2. The adapter card must be inserted into the M.2 NGFF SSD interface that supports the NVMe protocol. If your interface cannot support the NVMe protocol M.2 NGFF SSD, it definitely not work! 3. This adapter card is equipped with a 12cm flexible cable. 4. Whether it can be used as a system disk is related to your motherboard and has to do with the adapter card. Generally, motherboards using DDR4 memory can support NVMe protocol SSD as boot disks. Some old motherboards can also boot NVME SSD by flashing the BIOS. 5. After receiving the goods, do not disassemble the FPC flexible cable by yourself, because this cable needs to be inserted in a different direction. If you mistake it, the consequences be serious, and it burn the adapter card, motherboard and SSD! 7 does not support NVMe, so do not test under 7 system. Please use the SSD after entering the disk manager to re-partition and format it. Color: Black Material: plastic Package Contents: 1 x Riser Card 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.