* 30-130 dB, auto range, manual range. * Frequency and time weighting, IEC 61672 class 2. * A or C frequency weighting. * Fast/Slow time weighting, peak hold. * Data hold, Record(max., min.). * AC output, RS232 computer interface. * Data logger. * Type K Thermometer : -100 to 1300 oC, oC/oF. * Type J Thermometer : -100 to 1200 oC, oC/oF. * Optional probe(EM-900P)for Humidity/Temp., Light and Anemometer measurement. * DC 1.5V battery(UM-4, AAA)x 6 or DC 9V adapter in. * Patened.