40Gbps High Speed:40Gbps M.2 NVMe SSD Enclosure is equipped with for Thunderbolt USB4.0 interface, the theoretical read and write speed can reach 3000MB/s and the transmission speed is up to 40gbps. As fast as Lightning-Pattern, 2.5G files can be read in less than 1 second. It is suitable for Thunderbolt 4/3 USB3.2/3.1/3.0 interfaces. Large Alloy Fins Design:USB4 M.2 SSD Case with alloy body and finned heat dissipation plate enable SSD to operate at low temperatures, eliminating noise from fans, providing stronger heat dissipation and more stable operation. Bi-Colour LED Indicator:When you connect a device with USB4 or for Thunderbolt 4/3 interface in 40Gbps mode, the green indicator light on; when you connect a device with USB3.1 or below standard interface in 10Gbps mode, the white indicator light on. Wide Compatibility:ASM2464PD M.2 enclosure compatible with M.2 PCIe Gen 4.0x4 NVMe M Key,NVMe B+M Key in sizes 2280/2260/2242/2230 up to 4TB, NOT compatible with M.2 SATA SSDs, M.2 PCIe AHCI SSDs, M.2 PCIe devices. Supports system multi OS, for Windows, for Mac OS, Linux, for Android. Plug and play, no drive and power supply required. Note: This is an SSD enclosure only and does not include any NVMe SSDs Color: Silver Material: Aluminum Alloy Package Contents: 1 x USB4 hard drive enclosure