Features: M key M.2 NGFF SSD to PCI-E X4 adapter or B key M.2 NGFF SSD to SATA adapter. The speed and other properties is not changed, only change the interface type and without any software or drivers. Support size: 22*30 mm, 22*42 mm, 22*60 mm, 22*80 mm M.2 NGFF SSD. Macth with two kinds of Metal sheet ( length: 8 cm, 12 cm ) Compatible with any operating system ( On the premise of operating system must be compatible with your hard disk ). Description: 100% brand new and high quality Product name: M.2 NVME to PCI-E 3.0 X4 Expansion Card Type: PCIE to M2 Adapter Internal Interface: M Key + B Key Dual Ports Support Slots: PCI-E 3.0 X4 GEN3 (Compatible with X4 X8 X16 slot) Support devices: PCI-E specification m.2 NVMe and SATA specification M.2 NGFF disk Support system: Windows XP/Vista/7/8/10, Linux, Mac OS. A:NVME capacitors only B:Dual disk (NVME+NGFF) classic model C:Dual disk (NVME+NGFF) Package include: 1 x PCI-E to M.2 NVME Adapter Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3cm measuring deviation due to manual mearement.