Ports: 2 x Thunderbolt(TM) 3 (USB Type-C) PCIe and Lanes: PCIe Gen3 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(TM) 3 Expansion Card enables high-speed data transfer to accelerate everyday tasks and applications. Video editing studios in particular can greatly benefit by being able to smoothly transfer, display and edit 4K videos in real-time. Thunderbolt(TM) 4 devices can also be used by a NAS with a Thunderbolt(TM) 3 Expansion Cards when connected using standard Thunderbolt(TM) 4 certificated cables or passive Thunderbolt(TM) 3 cables shorter than 0. 8 meters.