Product name: M.2 NVMe To PCIe 4.0/3.0 x16 extension cabl Models:R13SC-WK 4.0 fer Speed: PCIe 4.0 x1 Gen4, 16G/ (Max.) fer Speed: PCIe 3.0 x1 Gen3, 8G/ (Max.) Adapted graphics card: RTX3090 RX6800xt, supports PCIE 4.0 / 3.0 graphics cards Use restrictions: The product is only for professional engineers, ordinary users do not support use, and old equipment 3 years ago does not support use. PCIe4.0 has high requirements on the equipment, as long as the extension cable is connected, the signal be attenuated. This product does not the full speed of PCIE4.0, the equipment is aging, the signal is poor or the environment is not good, please reduce the speed to use. (The product appearance and printed words depending on the batch, but this does not affect use) size: 25cm Material: PCB colour: As Shown Package Contents: 1 x M.2 NVMe To PCIe 4.0/3.0 x16 extension cable 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.