• SOUND LEVEL METER, type 1 Model: SL-4022 • Frequency & time
weighting meet IEC 651 type 1. • 30 to 130 db, 3 ranges, Max hold,
Data hold. • A/C rrequency weighting, F/S time weighting. • AC
output, internal 94 dB calibration. • Professional sound level
meter. • Size: 260 x 87 x 36 mm.