Brainboxes Universal 1-Port Velocity RS422/485 PCI Card. Host interface: PCI, Output interface: Serial RS422/485. Data transfer rate: 0.921 Mbit/s. Width: 64 mm, Depth: 125 mm, Height: 5 mm. Certification: CE, FCC, UL, PCI 3.0. Platform: PC, Connectivity technology: Wired, Form factor: Standard