Tenmars ST-130 二合一噪音剂量计（30~90dB，50~110dB，70~140dB）
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Display: Single LCD Maximum reading 999999
Display Refresh Rate: 1 Time/second
Microphone (ST-130): 1/2" Electret condenser microphone
Accuracy: ±1.4dB at 94dB/1kHz
Frequency Weighting: A, C, Z
Time Weighting: Fast, Slow and Impulse
Starting Time: < 10 seconds
Frequency Range: 20Hz to 8kHz
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