Full-duplex audio channel

Built-in loudspeaker with volume control (potentiometer) and indication (LEDs)

Gooseneck microphone

Microphone amplifier with variable compression and noise gating (squelch)

Push To Talk or Push To Mute key, Cradle key

Connection for an external analog Tipro Handset via RJ 4P/4C connector

Programmable switching between the three audio channels

Additional 12 V power supply required