Dell Latitude 12–7275 Owner's Manual page 63

Environmental requirements
Temperature range:
Operating
Non-operating
Relative humidity (maximum):
Operating
Non-operating
Altitude (maximum, unpressurized):
Operating
Storage
Keyboard
Width
Height
Thickness
Weight
Type
0°C to 35 °C (32°F to 95 °F)
-40°C to 65 °C (-40°F to 149 °F)
10% to 90% (non-condensing)
5% to 95% (non-condensing)
-15.20 m to 3048 m (-50 ft to 10,000 ft)
-15.20 m to 10,668 m (-50 ft to 35,000 ft)
269.90 mm (10.63 in.)
104.95 mm (4.13 in.)
3.85 mm (0.15 in.)
0.55 kg (1.22 lb)
Full-size, backlit chiclet keys with 1.9 mm key travel
63