The Folsom PS-2001 PresentationPRO AV Switcher is a rental unit that combines multiple functions into a single device for professional AV presentations. It acts as a 7-input A/V router, video scaler, audio processor, and offers a control panel for easy operation. It supports various video formats, including composite, s-video, component, and computer resolutions up to UXGA, and provides seamless switching between sources with effects like cut, fade, dissolve, and wipe.