... . Our products include laser distance meter,infrared thermometer, anemometer, sound level meter, noise meter, vibration meter, ultrasonic thickness gauge, film/coating ... ±1.5 dBdigit & resolution4 digits & 0.1 dBfrequency response31.5Hz ~8.5KHzmeasuring range30~130, 40~90, 50~100, 60~110, 80 ...