Functionality: Equipped with a large high-definition LCD screen, this decibel meter measures sound levels and functions as a thermometer, hygrometer, clock, and timer. The A-weighted SPL meter is designed to mimic the human ear's sensitivity to low-intensity noises, making it suitable for ambient noise monitoring. Precision Measurement: Measures sound levels from 30 to 130 dB with an accuracy of 1.5 dB, covering frequencies between 35 Hz and 8.5 kHz. It also measures humidity from 20% to 85% and temperature from -10°C to 60°C (14°F to 140°F). Due to varying environmental conditions, a deviation of 0–15% in readings may occur and is considered normal. Long-Lasting Battery Life: Powered by a built-in 2000mAh lithium battery, the device provides 3 to 5 days of continuous use and up to one week on standby, ideal for extended monitoring in studios, classrooms, and industrial environments. User-Friendly Interface: Adjust brightness using the left and right buttons; press and hold the M button to set the time. Temperature can be displayed in Celsius or Fahrenheit, ensuring ease of use in various settings. Important Usage Information: Each unit is calibrated and tested before shipping. The battery may not be fully charged upon arrival. The battery indicator shows red during charging and turns green when fully charged, providing clear power status. Color: White Material: Plastic Package Contents: 1 x Digital Decibel Meter Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement error allowance is +/- 1–3 cm.