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Max Hold and Data Hold FunctionAuto Power OffLevel Range: Low - 0-100dB High - 60-130dBAccuracy: +/- 1.5dB (ref. 94dB @ 1kHz)Frequency Range: 31.5 Hz to 8 kHzFrequency Weighting: A and C TypeTime Weighting: Fast SlowOperation Temperature: 0 to 40ºC (32 to 104º F)Operation Humidity: 10 to 90% RHStorage Temperature: -10 to 60º C (14 to 140º F)Storage Humidity: 10 to 75% RHBattery Type: 9V (Included)Dimensions: 9.06'' H x 2.17'' W x 2.17'' DWeight: 7.20 oz.