... include laser distance meter,infrared thermometer, anemometer, sound level meter, noise meter, vibration meter, ultrasonic thickness gauge, film/coating thickness gauge, digital hygrothermograph, high voltage ... /low reaction ratesampling frequencytwice/smicrophone1/2 inch capacitive microphoneAC/DC signal outputMAX holdoverload displayOVER / UNDER symbol displayauto inductive backlightlow power ...