SDI input port: BNC SDI4 ^^
SDI output port: BNC SDI4 ^^
Button: 4, IR: 1 ^^
SDI standard: Compatible SMPTE 424M, SMPTE 292M and SMPTE 259M-C ^^ Designed for professional SMPTE video applications this HD-SDI, SD-SDI and 3G-SDI SDI 4x4 Switch allows you-Inch determine which of four connected SDI video sources will be displayed on the four SDI monitor.