The ProFlight Series 2 aviation in-ear headset from Bose is designed specifically for jet pilots.
1 cm W x 8 cm D (127.6 g on head) - ProFlight Aviation Headset (sliders not extended):, 21.6 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).4 cm H x 16.