Measurement range is 30-130dB, suitable for sound or noise measurement in most cases. Suitable for sound quality monitoring in factories, offices, homes, schools and construction sites. The product adopts 4-digit display, which makes reading data more clear and convenient. With maximum and minimum hold function. Data hold function. Red backlit alarm and audible alarm. Automatic or manual power off function. Temperature measurement function. High sensitivity sensor, fast and more accurate measurement. Measurement range 30-130dBA Accuracy Reference SPL point 1.5dB to 94dB at 1KHz Frequency weighting A weightingFrequency range 31.5Hz to 8.5 kHzSampling rate 2 times/secondData hold Maximum and minimum hold Digital display 4 digits Resolution 0.1dB Temperature measurement range -10C~50 14F-122F) Accuracy 2 Resolution 0.1 Microphone 1/2inch electret condenser microphone Power supply AAA battery X 3 (not included) Package list: 1 * sound level meter 1 * instruction 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 ers, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you