The measuring range is 30 to 130 dB, which is suitable for measuring sound or noise in most cases. Suitable for sound quality control in factories, offices, homes, schools and construction sites. The product adopts a 4-digit display, which makes the reading data clearer and more convenient. With maximum and minimum hold function. Data hold function. Red backlit alarm and audible alarm. Auto or manual power off function. Temperature measurement function. High sensitivity sensor, quick and more accurate measurement. Measuring range 30-130dBA Accuracy Reference SPL point ± 1.5 dB to 94 dB at 1 KHz Frequency weighting One weighting Frequency range 31.5 Hz to 8.5 kHz Sampling rate 2 times / second Data hold Maximum and minimum hold Digital display 4 digits Resolution 0.1 dB Temperature measurement range -10 ° C ~ 50 14F-122F) Accuracy ± 2 Resolution 0.1 Microphone 1 / 2inch electret condenser microphone Power supply AAA X 3 battery (not included) List of packages: 1 * sound level meter 1 * user manual instructions Note: this does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between the different monit eurs, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!