This listing is for a RGB Spectrum QuadView UHD multiviewer (QV-UHD). The unit is a compact video processor designed to display multiple video sources on a single screen. The front panel provides direct input selection, layout and audio controls; the rear panel includes multiple digital and analogue inputs, HDMI output, audio outputs, optical S/PDIF and control ports (LAN / RS‑232 / USB). Output resolution is selectable from the front panel (including AUTO, 4K, 1080p, 720p and several computer resolutions).