The VS−4X is a high−performance switcher for balanced stereo audio signals on XLR connectors. It switches any one of four stereo signals to a single stereo output.- Mechanical Switcher- XLR Connectors- Rack Kit − RK−4X- Size - Compact Desktop - 2 units can be rack mounted side-by-side in a 2U rack space with the optional RK-4X adapter.- Audio - B