Dimensions (Height x Width x Depth):
  Contura Aero 4/25                  1.5 x 10.25 x 7.5 inches
                                     (3.8 x 26 x 19 cm)
  Contura Aero 4/33c                 1.7 x 10.25 x 7.5 inches
                                     (4.3 x 26 x 19 cm)
Weight (Contura Aero 4/25):
  Model 170 standard battery         3.5 lb (1.63 kg)
  Model 170 extended life battery    4.0 lb (1.81 kg)
Weight (Contura Aero 4/33C):
  Model 170                          4.2 lb (1.9 kg)
  Model 250
Power Requirements                   10.8 V
Temperature Range:
  Operating                          50oF to 104oF (10oC to 40oC)
  Nonoperating                       -4oF to 140oF (-20oC to 60oC)
Relative Humidity (noncondensing):
  Operating                          10% to 90%
  Nonoperating                       5% to 95%
Shock:
  Operating                          10G, 11 ms, half sine
  Nonoperating                       60G, 11 ms, half sine
Vibration:
  Operating                          0.25G, 5 - 500 Hz 1/2 octave/min
                                     sweep 1 hour duration
  Nonoperating                       1G, 5 - 500 Hz, 1 hour duration
Maximum Altitude (unpressurized):
  Operating                          10,000 ft (3,658 m)
  Nonoperating                       30,000 ft (12,192 m)