DR. METER
Features Measurement Range: 30dBA ~ 130dBA Accuracy Within +/-1.5dB; Resolution: 0.1dBA Large LCD screen display; 15 minutes auto power off Data hold function Max/Min sound level measurement Uses a 9V Battery - INCLUDED Specifications: Frequency range: 31.5Hz - 8kHz Range: 30-130dBA Microphone: 1/2 inch electric condenser microphone Calibration: Electrical calibration with the internal oscillator Display: LCD 4 digits