A complete portable HD studio in a single unit. Single-person operation of sound and video using tactile faders, buttons and touch screen. The Roland VR-4HD all-in-one AV mixer beautifully integrates a digital audio mixer, video switcher, multi-viewer with touch screen and USB video/audio output stream in a stand-alone device. This unit is very easy-to-use, simplifies workflow, is easy to setup, and delivers exceptional functionality in a compact footprint. This portable live HD production and streaming solution is ideal for schools, churches, council meetings, corporate events, sports, trainings, or any other live event.