30-130DB: The measuring range is 30-130 dB, which is very suitable for measuring sound or noise. (Normal conversation sound is 40-60 dB). WIDE APPLICATION : This sound level meter is suitable for sound quality monitoring 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 audible alarm. Automatic or manual power off function. Temperature measurement function. HIGH PRECISION: This sound level meter is a high sensitivity, fast measuring and more accurate sensor. CLEAR READING: The product adopts a 4-digit display, which makes the reading data clearer and more convenient. Specifications: Model: ST9604 Measuring range --- --- 30-130dBA Accuracy --- --- 1.5 dB reference SPLpoint at 94 dB at 1 KHz Frequency weighting --- --- One weighting Frequency range --- --- 31.5Hz-8.5KHz Sampling rate --- --- 2 times / second Data hold --- --- Maximum and minimum hold Digital display --- --- 4digits Resolution --- --- 0.1dB Temperature measurement range --- --- -10C ~ 5014F-122F) Accuracy --- --- 2 Resolution --- --- 0.1 Microphone --- --- 1/2inch electret condenser microphone Power supply --- --- AAA Battery p> Color: Black Quantity delivered: 1 piece