iriSelect is a control and status interface for the iriSound. From the iriSelect you can activate the transmit function of up to 4 connected radio system (e.g. marine VHF, TETRA, MIL, SAT, etc.). Incoming and outgoing audio on each radio is indicated separately by a corresponding LED. iriSelect also acts as status display for the entire iriSound system, and indicates failure statuses, like missing wireless connection. The mode switch selects one of up to 10 preset audio routing modes, which is instantly sent to iriSound. Each mode defines the complete port-to-port routing of all audio, which means you can set up predefined intercom groups and switch between them.