Ports: 2 x Thunderbolt™ 3 (USB Type-C) PCIe & Lanes: PCIe Gen 3 x 4 Bracket: Low-profile pre-installed; full-height Form factor: Low-profile Supported operating systems: Qu TS hero 4.5.0 or later; QTS 4.4.0 or later Package Contents: 1 x QXP-T32P; Low-profile pre-installed bracket; full-height bracket The Thunderbolt™ 3 Expansion Card enables high-speed data transfer to accelerate everyday tasks & applications. Video editing studios in particular can greatly benefit by being able to smoothly transfer, display & edit 4K videos in real-time. Thunderbolt™ 4 devices can also be used by a NAS with a Thunderbolt™ 3 Expansion Cards when connected using standard Thunderbolt™ 4 certificated cables or passive Thunderbolt™ 3 cables shorter than 0.8 meters.