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Roland VR-4HD Video Switcher
Roland VR-120HD Direct Streaming AV Mixer VR-120HD B&H Photo
Amazon.com: Roland VR-3EX All-in-one AV Mixer with Built-in USB Port for Web Streaming and Recording, 2.5" Multiview Touchscreen Monitor, Standard Definition 16:9 Mixing Engine, Scalers on Channel 4 and Output : Musical