... 1.IEC,ANSI standard 2.measuring range 30~130 dBA,35~130 dBC 3.MAX hold,auto power off ... integrated company. Our products include laser distance meter,infrared thermometer, anemometer, sound level meter, noise meter, vibration meter, ultrasonic thickness gauge, film/coating thickness ... : IEC651 TYPE2B: ANSI S1.4 TYPE2measuring range30~130 dBA, 35~130 dBCaccuracy±1.5 dBdigit & resolution5 digits & ...