1. Accuracy: class 1
2. Air Pressure compensation: automatic compensation
3. Sound pressure level: 114.0dB and 94.0dB
4. Frequency: 1000Hz
5. Settling time: less than 15s
6. Operating voltage range: 2.2V~3.4V
7. Battery: 2 x 1.5V AA batteries (not included)
8. Complies with authoritative standards GB/T 15173-2010 and IEC 60942:2017, providing accurate sound pressure sensitivity calibration for testing microphones and acoustic measuring instruments.
9. Switch sound pressure levels with the toggle button for faster and more convenient calibration.
10. Dimensions: 72x72x42mm
11. Weight: 96g