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* Plug in the SL-417 to be used as a professional sound level meter.
* Frequency and the weighting meet IEC 61672 class 2.
* A frequency weighting.
* Range : 3 ranges 30 to 130 dB.
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| Description： |
| * Plug in the SL-417 to be used as a professional sound level meter. * Frequency and the weighting meet IEC 61672 class 2. * A frequency weighting. * Range : 3 ranges 30 to 130 dB. * External calibration adj. VR. |
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