Bag, Tone Booster, Acoustic, Apollo 11


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

A special stowable device was provided in the Apollo Command Module that could be connected to the spacecraft caution and warning system and mounted on either side of the spacecraft. Its purpose was to allow all three astronauts to sleep simultaneously with their headsets removed and warn them with a loud acoustic signal if, while asleep, an event occurred that required their attention.

Consisting of a power plug, a tone booster, and a photosensitive device to trigger the tone whenever the spacecraft Master Alarm lamp became illuminated, this unit was stowed in a special beta cloth container and flown on the Apollo 11 Command Module during its historic mission. The unit nad this container were transferred to the Smithsonian in 1970.

Collection Item Long Description:

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum

Credit Line

Transferred from NASA


  • Synthetic Fabric
  • Ink
  • Copper Alloy
  • Chrome Plating


  • 3-D: 25.4 x 5.1 x 24.1cm (10 x 2 x 9 1/2 in.)
  • Storage: 34.6 x 31.8 x 9.2cm (13 5/8 x 12 1/2 x 3 5/8 in.)

Country of Origin

United States of America



Inventory Number