Sound Level Calibrator

Calibration source for Sound Meters. -Features & Benefits : Conforms to ANSI S1.40-1984 and IEC0942:2003 Class 2 Fits 1 in., 1/2 in. and 1/4 in. diameter microphones Internal battery test CE and RoHS approved Specifications : Output Levels: 94dB and 114dB ±0.5dB at reference conditions Reference Conditions: 68°F (20°C), 65% RH,1013mbar Output Frequency: 1kHz ±2% Temperature Coefficient: ±0.02db per °C Total Harmonic Distortion: <2% Power Source: 1 '9V' battery (included) Includes : 2 microphone adapters Carrying case Battery