Apple Performa 6400/180 - Manual (Page 73)

Specifications Environmental - 19
Environmental
Temperature
Storage: -40° F to 116.6° F (-40° C to 47° C)
6400
Operating: 50°–104° F (10°–40° C)
6500
Operating: 50°–97° F (10°–35° C)
Humidity Noncondensing, 5–95%
Altitude 0–10,000 ft. (0–3,048 m)