40Gbps High Speed:USB4 interface, the transfer speed can reach 40Gbps,Complete file transfers quickly,About 8 times faster than conventional USB3.0 standard interface transfer speeds. Built-in Cooling Fan:Rapid heat dissipation through vents on both ends of the SSD enclosure,Avoiding high heat generation and affecting transmission speeds.Note:You don't need to install thermal grease on your SSD to avoid affecting the air duct ventilation. Up to 4TB Expansion:We recommend that you use an M key/ key NVMe SSD of up to 4TB.This is an SSD enclosure only and does not include any NVMe SSDs. Tool-free Installation:No need to remove and install screws, use the card pin to complete the installation, easy to operate. The built-in cooling fan also eliminates the need to install thermal grease yourself. Colour:Black Material:Aluminum alloy + ABS Package Contents: 1 x SSD enclosure 1 x Data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.