Blackmagic Multiview 4 HD

Description

Each view ia a completely independent video monitor with overlays that you can turn on and off such as custom labels, audio meters and more. 
Full frame re-synchronization on each input lets you monitor any combination of video signals, even if they are different frame rates. 
The multi rate 3G-SDI connections are compatible with all existing SD and HD equipment and formats up to 1080p60, including Level A and B devices. 
Plus, you get both 3G-SDI and HDMI outputs so you can use traditional SDI displays or even low cost big screen televisions.