This is a USB4 40Gbps compatible SSD enclosure. It allows you to use an M.2 NVMe SSD as an ultra-fast external SSD. It uses the latest ASMedia ASM2464PD, offering high compatibility and fast communication with Intel, AMD, and Mac environments. The enclosure itself is made of aluminum and has excellent heat dissipation. I was using it with the Micron Crucial P5 Plus SSD I also have listed, but I no longer need it because I purchased a larger capacity SSD and a Thunderbolt 5 compatible SSD enclosure. However, this is still fast enough with USB4, so I think it can still be used for a long time. Please see my profile for other notes. Instant purchase is welcome.