PCI express 16x interface, only supports M key M.2 PCI Express SSD, does not support B key, B+M key M.2 SATAIII SSD. The bracket size is 22 x 30mm 22 x 42 mm, 22 x 60mm, 22 x 80mm M.2 NGFF SSD.Compatible with any operating system (provided the operating system must be compatible with your hard drive). Professional heat dissipation structure design, easy to install, stable performance.