Io Express is a compact external I/O device for PC or Mac, designed for field and studio use. It supports 3G-SDI and HDMI video inputs/outputs alongside analog component and composite video outputs. Compatible formats include HD 1080i/p, 720p, and SD 525i/625i. Audio handling includes 8-channel embedded digital (SDI/HDMI) and 2-channel analog RCA output. The unit connects via PCIe X1, features RS-422 machine control, and operates within 0–40°C. Its 12–18V power design suits mobile workflows without video processing functions.