The document provides safety instructions and setup instructions for the EDIROL VIDEO MIX/LIVE SWITCHER LVS-400. It can be connected to up to four video input devices like cameras and playback devices. The AC adapter should be connected to power the unit. Video and optionally audio cables can connect the input devices to the switcher, and video cables can connect the switcher to an output display. Basic operation instructions are given to switch between inputs or overlay images, and advanced effects like inserting are also described.