Dell Inspiron 7791 2n1 Setup And Specifications page 18

Description
Altitude (maximum)
* Measured using a random vibration spectrum that simulates user environment.
† Measured using a 2 ms half-sine pulse when the hard drive is in use.
18 Specifications of Inspiron 7791 2n1
Operating
–15.2 m to 3,048 m (–50 ft to 10,000 ft)
Storage
–15.2 m to 10,668 m (–50 ft to 35,000 ft)