... A,C, linearityDetector characteristicsTrue effective value, peak valueTime weighting Fast (F), Slow(S), Impulse (I). Max hold, with AC/DC signal ... be equipped with filter connectorOverload indicationFull scale +10±0.5dB, LED Power DC 6v, 4 pieces of 1.5v batteries, with ... ,AC output portDimensions 290mm×106mm×65mmWeight 0.67kg(without batteries) led indication precise impulse sound level meter