WIDE APPLICATION: This sound level meter is suitable for monitoring sound quality in factories, offices, homes, schools, theaters, audio systems construction sites < li>30-130DB: The measurement range is 30-130dB, which is very suitable for sound or noise measurement (Normal conversation sound is 40-60dB) < /li>MAIN FUNCTION: With maximum minimum hold function Data hold function Red backlight alarm sound alarm Auto or manual power off function Temperature measurement function < /li>HIGH PRECISION: This sound level meter is a high sensitivity sensor, which is quick to measure more accurate CLEAR READING: The product adopts a 4-digit display, which makes the data of clearer more convenient reading Specifications: Br: SMART SENSOR < p>Model: ST9604 Measurement Range --- --- 30-130dBA Accuracy --- --- 1 5dB from reference SPLpoint to 94dB at 1 KHz Frequency weighting --- --- One weighting Frequency range --- --- 31 5Hz-8 5KHz Frequency rate 39;sampling --- --- 2 times/second Data hold --- --- Maximum minimum hold Digital display --- --- 4digits< /p> Resolution --- --- 0 1dB Temperature measurement range --- --- -10C-5014F-122F) < p>Precision --- --- 2 Resolution --- --- 0 1 Microphone --- --- 1/2inch Electret Condenser Microphone Power supply --- --- AAA battery X 3 (not included) Package list: < p>1 sound level meter 1 instruction manual Welcome to meet