Features: Support 4 disks ; can be used for computers, servers Hollow array design, strong heat dissipation LED work indicator;Plugging in the disk power: green lights; Read and write: green lights flashing Thickened using gold-plating process, more solid contact, more stable data transmission. Support PCIE 4.0 backward compatibles PCIE 3.0 Support X16 card slot Motherboards needs to support PCIE X4X4X4X4X4 split Specifications: Item: PCIE X16 4bay Adapter Support PCIE4.0 PCIE3.0 Connection and for 2.5inch Size:about 32x11.50cm/12.6x4.53in Package Includes: 1PC PCIE X16 4bay Adapter note: Due to problem of lighting effect, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurement.