Features: Supports the use of commercially available AHCI protocol hard disks Compliant with NVMExpress Supports the use of NVME protocol hard disk in the market Supports the use of nvme protocol for hard disk in 2015 (none of the previous old hard disk enclosures support nvme for hard disk) Support PCle 0Gen 3x2, up to 16Gb /s Support PCle 1Gen 3x2, up to 16Gb /s Supports UASP and TRIM commands to speed up Solid Disk drive read/write speeds USB3.2 standard transfer speed up to 20Gbps Backward compatibles USB3.1 and USB3.0. Specifications: Item：USB3.2 Solid Disk Enclosure Supported Capacity 4TB Product Size 10.8x4.1x1.50CM/4.25x1.61x0.59in Transfer Interfaces USB Transfer Speed 20Gbps 3.2 PClExpress Component：Aluminum Alloy This product is only for 2013 2014201520162017 year For AIR, Known to support the following models 2013 A1493 A1502 (MD864 MD865 MD293 Md294)Solid Disk 2013 A1398 A1502 (ME864 ME865 ME866 ME293 ME294)Solid Disk 2013 Air A1465 A1466 (MD711 MD712 MD760 MD761)Solid Disk 2014 Air A1465 A1466 (MD711 MD712 MD760 MD761)Solid Disk Package Includes: 1PC USB3.2 Solid Disk Enclosure note: Due to problem of light effects,there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurements