1. This riser card uses ASM1061 bridge chip, only supports SATA M.2 NGFF SSD, does not support any NVMe protocol M.2 SSD! 2. When this product is used with the expansion card of JMB575 chip, the driver needs to be installed, otherwise the expansion card only recognizes one hard disk, and this driver only supports system! 3. Be careful not to use the PCI slot as a PCIe slot, and do not insert it backwards, otherwise the device will be burned! Don't come and talk to me when I receive it, I plug it in normally after receiving it, and it as soon as it is turned on. Our shop is all tested on the machine. If you really want to burn it, it 't be your turn to burn it! 4. This product supports installation in PCIe x1/x4/x8/x16 slots, and supports PCIe 5.0 4.0 3.0 2.0 1.0 protocols. Points to note before buying: 1. Please make sure that your motherboard has a PCIe slot and does not support PCI slots. This is extremely important! Inserting it in the wrong position or inserting it backwards will burn the device! If you don't understand what is PCIe and PCI, please consult the official customer service of your motherboard. If you really don't understand, please don't buy it! 2. Make sure your hard drive is a SATA M.2 NGFF SSD. This adapter card does not support NVMe protocol SSD. Note:Due to different production batches, there are differences in silk screen printing, which does not affect the use. Colour:Black Material:PCB+Metal Package Contents: 1 * PCI-E to M2 Adapter 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.