Input port1SDI port (BNC) 1VGA port 1AV port ^^ Output port 2SDI portsBNC ^^ Our VGA & AV to SD/HD/3G-SDI Converter is used to convert VGA OR AV video source to SD/HD/3G-SDI signal ^^ Support 2 ports of the SDI(SD-SDI/HD-SDI/3G-SDI) signal output ^^ VGA OR CVBS video signals into SDI signals for display on computer peripherals such as projectors and monitors