a compact, high-precision sound level calibrator for verifying the accuracy of sound level meters with -inch microphones. Engineered to meet IEC 60942 Class 2 standards, it delivers consistent and reliable calibration signals at 94 dB and 114 dB sound pressure levels, with a stable 1 kHz output frequency.

• 94dB and 114dB sound calibration at 1kHz
• Accuracy: + /- 0.5dB
• 9V battery included