... hold function6. automatic measuring function7. basic configuration: main machine, printer(with rechargeable battery), microphone(TL14423), bracket, CD, fan cover, horologe ... filter+4 teams regularConnector RS-232C, can be connected with printer and microcomputer communication to print measured data and ... Printer: 178mm×81mm×31mmWeight 0.4kg , printer: 0.41kg digital sound frequency analysis meter