The VS-601XLM Vertical Interval Video-Audio Switcher from Comprehensive/Kramer is a device designed for switching composite video and unbalanced audio signals. The unit switches during the vertical interval to ensure glitch-free switching with genlocked sources.High Bandwidth - 400MHz (-3dB). Vertical Interval Switching. Switching Synchronization - Synchronizes either to external reference or the incoming video. Control - Front panel RS-232 (K-RouterTM Windows®-based software is included), RS-485, & contact closure. Output - 3 audio & video. Standard 19" Rack Mount Size - 1U.Kramer