3 user selectable modes: 4 wire (for standard connection to other broadcast equipment)
Interrupt loop through (IFB) for monitoring & adding talkback over incoming audio 2 wire conference mode for connecting multiple GS-FW021 together 2 wire mode compatible with prospect C1B
Headset connection on 3 pole 6.35mm (A/B gauge)
Push to talk button for mic input
Limiter circuit for mic input
Headphone volume control
Auxiliary audio input (on 3.5mm jack) fed to headphone circuit
Transformer balanced 4 wire input/ output
Maximum dimensions just 152 x 42 x 72mm (l x w x d)
