The Kramer4X1VB is a compact, passive 4‑to‑1 composite‑video switcher designed for professional AV systems. It features four BNC video inputs and one BNC output, and offers a wide bandwidth (400MHz at ‑3dB) for high‑fidelity signal switching. As a purely mechanical device (no power required), it suits applications in presentation systems, CCTV, rental sound/stage rigs, and any environment where multiple video sources need to be routed to a single display or recorder. Key Features: Four video inputs and one composite (or component‑single‑channel) output via BNC connectors (1Vpp/75 Ω) High bandwidth of 400MHz (‑3dB) to preserve signal integrity even at high frequencies Mechanical “break‑before‑make” switching system ensures clean source switching without backfeed or ghosting Passive design requiring no external power supply—unselected inputs are auto‑terminated into a 75 Ω resistor