The black Otto Engineering Listen-Only Earphone Kit with Acoustic Tube is an IFB and personal monitoring earphone that features a 4' straight cable and a 3.5mm right-angle mini plug. It allows hands-free listening when used with an Otto Engineering speaker mic (available separately).
- Supports listen-only operation (no microphone)
- For use with Otto Engineering speaker mics
- 4' cable with 3.5mm right-angle mini plug
- Includes acoustic tube