QSC Q-SYS I/O-8 Flex Channel expander. Networked I/O expander peripheral. 8 software-definable Flex channels (mic/line input with phantom power, or line level output). Audio-to-USB Bridging for audio integration with soft codec applications. Control connectivity via GPIO and RS232. Microphone fault detection. Dual redundant networking with PoE+ support. Each unit factory reset and checked for operation. There may be some slight blemishes on some units’ cosmetics but the operational health on power up is guaranteed. Also limited variety availability on original Phoenix/euro connectors so some units may come with combined connector blocks than one for each input.