Portable sound level meter: a handy little tool ideal for noise monitoring, home theater setup, health and safety compliance, vehicle noise testing, etc. LCD display HD digital: Large, readable LCD display with backlight, which can quickly display the measurement, clearly and easily readable. Power source: 3 AAA batteries (included), low battery indicator, automatic shutdown without operation after 10 minutes, convenient and energy saving. Multifunction: measuring range from 30 to 130 dBA. Maximum / Minimum / Data Hold function - Automatic shutdown - Battery indicator: directly check the remaining battery. Many uses: designed to meet the measurement requirements of sound quality control in various environments. Ideal for testing music recording, noise complaints from neighbors, industrial settings, office settings, voice therapy and more. Features: Range: 30-130 dBA. Precision : 1.5 dB. Resolution: 0.1 dB - Frequency range: 31.5 Hz ~ 8 kHz. Sampling frequency : 2 times / sec. Microphone: 1.27 cm electret condenser microphone. Quantity: 1 piece 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 different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!