Bose II Owner's Manual page 22

Technical Information
22
Headset Weight
22 oz. (567 grams)
Temperature and Altitude (Category A1)
Operating Temperature:
+5° to +131° F (-15° to +55° C)
Storage Temperature:
-67° to +158° F (-55° to +70° C)
Altitude:
15,000 ft. maximum pressure altitude for full cancellation
®
The Bose Aviation Headset Series II headset, adapter cables, battery
packs, and boom microphone are FAA approved to TSO c-57a and c-58a.
The Bose Aviation Headset Series II has been designed to function in
or withstand exposure to the following environmental conditions.
Environmental categories cited refer to RTCA/DO-160C, 4 Dec 1989
and DO-214, 4 Mar 1993.
Condition
AF Conducted Susceptibility
Humidity
Magnetic Effect
Power Input
RF Susceptibility
Vibration
Voltage Spike
Shock drop...12 times, 1 meter onto
concrete
Category
B
B
Z
B
T
P&S
A