SOUND LEVEL METER, type 1
Model : SL-4022
* Frequency & time weighting meet IEC 61672 class 1.
* 30 to 130 dB, 3 ranges, Max. hold, Data hold.
* A/C frequency weighting, F/S time weighting.
* AC output, Internal 94 dB calibration.
* Professional sound level meter.
* Size : 260 x 87 x 36 mm.