40Gbps USB4 Speeds-WAVLINK enclosure offers data transfer speeds of up to 40Gbps for PCIe NVMe SSDs. When your computer is properly configured and your SSD is qualified, you can achieve impressive read and write speeds of up to 3800MB/s (Data sourced from WAVLINK Labs). With a capacity expansion support of 8TB. Cooling System-Constructed with a robust aluminum alloy case, this SSD enclosure ensures optimal protection for your SSD while prioritizing efficient heat dissipation. The inclusion of the thermal silicone pad and built-in fan facilitates dual heat ventilation effects. Compatibility-Designed to accommodate M key and B & M Key PCIe NVMe SSDs, this enclosure supports double-side SSDs in sizes of 2280, 2260, 2242, and 2230 (SSDs not included). It is also compatible with various operating systems, including Windows 10 or later, Mac OS 10.5 or later, and Linux, enabling seamless data transfer across different devices. Please note that the enclosure does not support AHCI SATA SSDs