Data Logging Sound Level Meter Digital Real-time data logger with integrated SD memory card Type 2 Alarm Backlit Display 35 to 130 dB dB Range Frequency Range 31.5 Hz to 8 kHz A C Frequency Weighting Accuracy +/-3.0 dB +/-2.0 dB +/-1.5 dB +/-1.0 dB +/-5.0 dB Resolution 0.1 dB Display 4 Digit LCD Not Applicable Counts 500 ms Response Time RS-232 Interface Microphone Type Electret Condenser Microphone Size 1/2 in Standards CE Class 2 IEC 61672-1-2013