Blackmagic Design - MultiView 4 HDhttps://www.photocineshop.com/en/products/BLACKMAGIC-DESIGN-MultiView-4-HD-AQMH88?cat=212
The Blackmagic MultiView 4 HD is a multi-view solution that allows you to simultaneously view four independent SDI sources on one screen! Control any combination of SD and HD formats and frame rates at the same time. It is possible to display information within each window, including custom meters and labels. The MultiView 4 HD incorporates SDI and HDMI outputs for monitoring professional SDI displays, projectors or widescreen televisions.