The ProFlight Series 2 wireless aviation in ear headset from Bose is designed specifically for airline crew With acclaimed noise reduction clear audio and intuitive operation for a comfortable flight ProFlight Aviation Headset sliders not extended 21 4 cm H x 16 1 cm W x 8 cm D 128 g on head ProFlight Aviation Headset sliders not extended 21 4 cm H x 16 1 cm W x 8 cm D 128 g on head ProFlight Series 2 Aviation Headset Carry case Carry case hook 2 AA batteries Control module holder 3 sizes of StayHear tips S M L ProFlight Series 2 Aviation Headset Carry case Carry case hook 2 AA batteries Control module holder 3 sizes of StayHear tips S M L