Item Type: Digital Sound Level Meter Material: ABS Battery: 3 x 1.5V AAA battery (without battery) Use: Widely used in schools, factories, offices, traffic, and other noise environment detection Sound Level Measurement: Measurement Range: 30-130dBA Frequency response: 30Hz-8KHz Dynamic Range: 50dB Accuracy: ±1.5dB (sound pressure standard, 94dB at 1KHz),±5dB (sound pressure standard, 94dB at 8KHz) 1、Capacitive Microphone: Without touching you can use this noise meter to measure the quality of sound and display the test results quickly and accurately. 2、Multifunctional: This noise meter is suitable for measuring not only sound decibels, but also ambient temperature and humidity. 3、Applicable Scene: The noise meter can be used to measure the sound level of various situations such as factories, workshops, schools, residences, office areas, etc. 4、Easy to Store: This noise meter comes with a storage bag, which is very user friendly and convenient for you to carry around. 5、Simple Operation: The illustration on the buttons of the noise meter allows you to understand visually what the buttons do, making it easy to use. 1 x Digital Sound Level Meter 1 x Storage Bag 1 x Instruction