Triplett SLM400-CAL Professional Sound Level Calibrator - 94/114dB for 1/2" Microphones

["Reliable Sound Level Calibration – Designed to verify and adjust sound level meters, ensuring accurate and dependable noise measurements in professional environments","Dual Output Levels for Flexibility – Selectable 94 dB and 114 dB output allows calibration across multiple measurement ranges and applications","Precision Accuracy Performance – Delivers ±0.5 dB accuracy with output frequency ±4% at 1 kHz for consistent and trustworthy calibration results","Wide Microphone Compatibility – Fits standard 1/2 inch diameter microphones","Portable and Ready to Use – Compact design includes a 9V battery for immediate operation and is backed by a 2 year warranty"]