30-130DB: The measurement range is 30-130dB, which is very suitable for sound or noise measurement. (Normal conversation sound is 40-60dB). p> WIDE APPLICATION: This sound level meter is suitable for monitoring sound quality in factories, offices, homes, schools, theaters, audio systems and construction sites. MAIN FUNCTION: With maximum and minimum hold function.Data hold function.Red backlight alarm and sound alarm.Auto or manual power off function.Temperature measurement function. HIGH ACCURACY: This sound level meter is a high-sensitivity sensor, which is quick to measure and more accurate. CLEAR READING: The product adopts a 4-digit display, which makes the reading data clearer and more convenient.