VisionIO-SDI4 is a four-channel PCIe Gen3 x8 SDI capture card delivering four 3G/HD/SD-SDI inputs with four outputs and on-board alpha-blended overlays for real-time monitoring. It supports up to 2.97 Gbps per channel, resolutions up to 4K/2160p at 60 Hz, audio-enabled capture, and flexible routing with zero-latency loop-through. Ideal for latency-critical live monitoring and overlay workflows in professional environments.