Upgraded Tbu405 Pro Built-in Cooling Fan: Built-in cooling fan and cooling holes are added to the aluminum alloy case for better heat dissipation (Note: SSD not included)JHL7440 Intel Certified Chip: Dual chip control, more stable and reliable, better heat dissipation, fully compatible with thunderbolt3/4, USB 4/3.2/3.1/3.0/2.0.Tool-less installation: no screws or screwdrivers required, plug and play.ACASIS m.2 housing supports M KEY and B&M KEY SSDs in size 2280.Light Speed 40Gbps: Speed test on Macbook Pro using Samsung 980 EVO Plus, ACASIS 40Gbps nvme hard drive enclosure delivers up to 2805MB/s / 2734MB/s read/write speeds (speeds may vary by system).Pocket-sized and easy to carry: The TBU 405 PRO has a compact design that can easily fit in your handbag or pocket, perfect for traveling and business trips.VERSATILE: This M.2 NVMe hard drive enclosure supports M1 Pro/Max Mac devices and iPad Pro. Compatible with USB 4/3.2/ 3.1/ 3.0/ 2.0 with varying speed limits for a variety of work and daily needs.