Output Sound Level : 94dB and 114dB under reference.
Accuracy : ±0.3dB (20°C, 760 mm Hg)
Frequency of 1000 ± 0.1% Hz allows calibration with A / B / C or D weighting networks or linear.
Low Battery Indicator (LED).
Operating Temperature range : -10 ~ +50 C
Storage Temperature range : -40 ~ +65 C (with batteries removed).
Temperature Coefficient : 0 ~ 0.01 dB / C
Calibration of "1 and ½" ceramic microphones.
Altitude Effects : Approx. 0.1 dB decrease for each 2000 feet increase in altitude from sea level to 12,000 feet elevation, or comparable atmospheric pressure change (approx. every 50 mm of Hg decrease).
Battery : Single 9V transistor Battery. (NEDA 1604)