... RS-232C, can be connected with printer and microcomputer communication to print measured data and frequency spectrum histogramSound calibration TL6020 ... sound level calibrator Sound level: 94dB, 1kHzDisplay 54mm×42mm LCD digital display, analog watch handDisplay measuring mode, measuring time, clock, ... Printer: 178mm×81mm×31mmWeight 0.4kg , printer: 0.41kg digital sound frequency analysis meter