IETLAB GenRad 1562-A Sound Level Calibrator

(Full specifications can be found on datasheet)

Acoustical Output: Frequencies: 125, 250, 500, 1000 and 2000 Hz
Frequency Accuracy: ±3%
Output Level: 114 dB re 20 x 10-6 µN/m-2
Level Accuracy: at 23oC and 790 mm Hg: ±0.3 dB @ 500 Hz; ±0.5 dB @ other frequencies.
Adaptors:Fits GenRad 1-1/8” mics directly other mics require adaptors (available in limited quantities).
Output Voltage: 1.0 V ±20% behind 6000 Ω.
Frequency Characteristic: Output is flat ±2%.
Distortion: < 0.5%.
Connector: Jack to accept standard 1/4” phone plug.
Power Requirements: standard 9 V alkaline battery (NEDA 1604 AC)
Dimensions: 5.7 cm W x 12.4 cm H (2.2 in W x 4.9 in H)
Weight: 0.45 kg (1 lb)
Operating Environment: 0 to 40oC, 0 to 95% relative humidity.
Storage Temperature: -40 to +60oC with battery removed.

Datasheet