Precise measurement of noise levels with frequency weighting filter according to dB (A) and dB (C) standard curvesSelectable time weighting factors for optimum adaptation to noise dynamics Long-term recording function with 16,000 storage points or real-time logging on PCSelectable analogue indicator for visual assessmentCalibrated and adjusted by means of standard 94 dB/1 kHz noise level calibratorSensitive electret condenser microphone with detachable wind guard Analogue outputs: DC and ACPC software (English)Large, illuminated displaySupplied with USB cable, batteries and carrying case