M.2 M Key to dual SFF-8087 SATA expansion card adopts PCIe 3.0 x2 channel design with a theoretical bandwidth of 16Gbps, supporting 8 SATA 6Gbps ports and a total capacity of up to 240TB (single disk supports 30TB). Built with high-performance chip and multi-layer precision PCB layout, it features excellent heat dissipation and anti-interference performance, effectively avoiding signal interference during multi-hard-drive operation. The LED indicator lights up when inserted and flashes during read-write, allowing real-time monitoring of hard drive status. It is plug-and-play without drivers, compatible with Windows 8/10, MAC, Linux, Synology NAS, ESXi, Feiniu and other systems, suitable for desktops, servers, NVR/DVR and industrial PCs. Comes with expansion card*1, screw*1 and screwdriver*1.