... 1 frequency spectrumFilter characteristics1/1 frequency intervalcentre frequency: 31.5Hz,63Hz,125Hz,500Hz,1kHz,2kHz,4kHz,8kHzMeasured data automatic storage500 ... be connected with printer and microcomputer communication to print measured data and frequency spectrum histogramSound calibration TL6020/6020A sound level calibrator ... ×81mm×31mmWeight 0.4kg , printer: 0.41kg handheld noise spectrum analyzer