路昌SL417声级计探头|路昌SL417声级计探头|路昌SL417声级计探头
* 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.