Plantronics MS50-T30-1 aviation headset is Plantronics' single plug version of the popular MS50. The headset is used by commercial airline pilots all over the world. This super lightweight, single-sided aviation headset features a solid-state amplifier with mini-microphone, five foot cable, and a single all-purpose plug (PJ068). Plantronics delivers greater clarity for in-flight communications with technology proven in America's space program. The MS50 is lightweight and comfortable so it's easy to wear even on long flights. Wear it with the included headband or mount the Plantronics MS50 on an after-market custom molded ear piece that eliminates the need to wear the headband.