Kramer Electronics VS-44HD VS-44HD is a high performance matrix switcher for HD-SDI and SDI digital video signals. Switching during the vertical interval ensures glitch-free switching with genlocked sources. Reclocking and Equalization - Automatic. HDTV Compatible. Switching Synchronization - Synchronize either to external reference or incoming video. Active Input Type Reporting - Each input button on the front panel automatically lights up when the unit detects a video signal on that input. Red indicates a standard definition (SDI) input signal and blue indicates a high definition (HD-SDI) input signal. Memory Locations - Store multiple switches as presets (salvos) to be recalled and executed when needed. Take Button - Execute multiple switches all at once. Control - Front Panel, RS-232 (K-Router Windows-based software is included), RS- 485, Ethernet, contact closure and IR Remote (included). Looping Analog Sync Input. Selectable Sync Signal Termination. Front Panel Control Lockout. Worldwide Power Supply - 90-240V AC. Standard 19? Rack Mount Size - 1U.