1、The adapter card uses differential line alignment to support PCI-E 3.0 1X signal. 2、Supports M.2 solid-state hard drives for M Key only, please confirm the NVMe specification identification. 3、PCI-E3.0 design, downward compatible 2.0, high-speed transmission. 4、Configuration of metal baffle to fix the adapter firmly. 5、Hot-swapping feature allows you to connect/disconnect. Features: The adapter card uses differential line alignment to support PCI-E 3.0 1X signal. Supports M.2 solid-state hard drives for M Key only, please confirm the NVMe specification identification. PCI-E3.0 design, downward compatible 2.0, high-speed transmission. Configuration of metal baffle to fix the adapter firmly. Hot-swapping feature allows you to connect/disconnect. Specification: Material: PCB Color: Black Name: M.2 to PCI-E3.0 X4 expansion card Model: PCENGFF-N01 Transmission Speed: 10000（MB/s） Interface: PCI-E 1X  PCI-E 4X Size: approx. 12 * 10.5 * 1.8cm/4.7 * 4.1 * 0.7in Package Weight: Approx. 69g / 2.4oz Support System: compatible with all WINDOWS systems, LINUX Package list: 1 * M.2 to PCI-E3.0 X4 Expansion Card 1 * Screw Pack Note: 1. M.2 NGFF to PCI-E X4 adapter card. Using this adapter card, the ordinary PCI-E X4 interface can be transferred to M.2 NGFF interface. There are four fixed holes on the board, 22*32 mm, 22*42 mm, 22*60 mm and 22*80 mm, respectively. 2. Support for Samsung PM961, 960EVO, SM961, PM951, sm951, INTEL 600P, building T10 and other NVME protocols M.2. M.2 of SATA protocol is not supported. 3. Standard version supports NVME M.2 of 2230 2242 2260 2280