... ,LE,Lmax,Lmin 3).RS-232 Interfac AC & DC OutputsAC output: 2 Vrms at full scale. DC output: 10mVDC/dBSoftwareWindows software for analysis of sound ... spectrum and other data on PC.Power4 size C (LR14) batteriesExternal DC Power ... , Software CD, RS-232 Cable, 9-pin to 25-pin adaptor, 3.5Ø plug, AC/DC Adaptor