■ Comply with IEC 60942 class 1. IEC 60942 Class 1. 94 dB, 114 dB. ±0.2 dB(+23 ℃). ±0.3 dB(-10 ℃~+50 ℃). ■ Pocket size, portable unit. Normal Sound Pressure Level. ■ Frequency 1000 Hz, give independence of weighting.
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