Designed for professional interpreters, the HCS-8685ST works with HCS-8600 or HCS-4800 main units and complies with ISO 20109 standards. Featuring "Closed Loop - Daisy Chain" topology, it ensures system reliability with PnP and automatic recovery. Supporting up to 64 channels, it is equipped with a 7" TFT LCD, 6 pre-select input and 3 output shortcut buttons, and Braille markings on all physical buttons. Offering direct, relay, and auto-relay interpretation, it enhances interpretation efficiency.