... , noise acquisition, noise frequency analysis2. built-in 1/1 frequency spectrum filter, RS-232C connector3. equipped with printer to realize spot ... printer and microcomputer communication to print measured data and frequency spectrum histogramSound calibration TL6020/6020A sound level calibrator Sound level: 94dB ... : 178mm×81mm×31mmWeight 0.4kg , printer: 0.41kg handheld noise spectrum analyzer