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 buzzer alarm. Automatic or manual power off function. temperature measurement. HIGH PRECISION: This sound level meter is a high sensitivity sensor, fast measurement and more accurate. CLEAR READING: The product adopts 4-digit display, which makes the reading data clearer and more convenient. Specifications: Brand: SMART SENSOR Model: ST9604 Measuring range: 30-130dBA Accuracy: ± 1.5 dB reference SPLpoint at 94 dB at 1 KHz Frequency weighting: One weighting< /p> Frequency range:31.5Hz-8.5KHz Sampling rate:2 times/second < p> Data Hold:Maximum and Minimum Hold Digital Display:4digits Resolution : 0.1dB Temperature measurement range: 10°C~50（14F-122F) Accuracy: ±2 Resolution: 0.1℃ Microphone: 1/2inch electret condenser microphone Power supply: AAA battery X 3 (not included) List of packages: 1 * sound level meter