Product features: 1. This adapter card uses 4-layer board differential pair routing and PCI-E4.0 connector to support PCI-E4.0 4X signal 2.With M.2 NVMe SSD PCI-E 4.0 X4 Adapter, you could add a NVME SSD on your motherboard without M.2 slot 3. With the channel of PCIe 4.0 X4, the speed be enhanced up to 64 Gbps, 7000+ MB/s random Read and 6000+ MB/s Write (Max), (note: this is speed, need motherboard also support Full speed PCIE 4.0), This PCIE 4.0 adapter can improve computer performance, backward compatible with PCIe 1.0 2.0 3.0 4. 4-layer PCBA, Multi-layer protection: Overcurrent protection,Overvoltage protection,Short circuit protection, (Electromagnetic Interference) protection, Heatsink layer for overheat protection . Maximum protection of M.2 NVMe SSD from electrical signal interference. 5. No driver required for Win10, plug and play, supports NVMe SSD, such as 980 Pro / 970 /950Pro/960EVO/XP941/PM951/PM961/SM951/SM961, Firecuda 520 series, SSD6/7 M6e Series, NVMe 4.0, SN850 and so on Specifications: Model: PCENVME-N42 Output interface: PCI-E 4.0 NVME KEY-M Hard disk size: compatible with 2230,2242,2260,2280,22110 Interface speed: up to 6500-7200MB/S Supported slots: PCI-E 4X/8X/16X PCB color: black Material: PCB+ metal Support system: WIN10/11/LINUX Product size: 130 x 120 x 5.25mm Package Contents: 2 x M.2 adapter 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.