Dell Alienware M11x R2 (Mid 2010) - Manual (Page 103)

CHAPTER 7: SPECIFICATIONS
103
Computer Environment
Altitude (maximum)
Operating –15.2 to 3048 m (–50 to 10,000 ft)
Storage –15.2 to 10,668 m (–50 to 35,000 ft)
Airborne contaminant level G2 or lower as defined by ISA-S71.04-1985