Portable Sound Level Meter: A handy tool ideal for noise monitoring, home theater setup, health and safety compliance, vehicle noise testing, and more. HD digital LCD display: Large readable screen with backlight that quickly displays measurements in a clear and easy-to-read format. Power source: Low battery indicator and automatic shutdown after 10 minutes of inactivity for energy efficiency. Multifunctional features: Measurement range from 30 to 130 dBA. Includes maximum/minimum value recording, data hold function, auto power-off, and battery level indicator for convenient use. Wide range of applications: Designed to meet sound quality monitoring requirements in various environments. Ideal for music recording, neighbor noise assessment, industrial and office settings, voice therapy, and similar uses.