This digital LED decibel meter combines sound level measurement with temperature, humidity, clock, and timer functions on a large high-definition LCD screen. The A-weighted SPL design mimics human ear sensitivity to low-intensity noises, making it suitable for ambient noise monitoring in studios, classrooms, and industrial settings. It measures sound levels from 30 to 130 dB with an accuracy of 1.5 dB, covering frequencies of 35 to 8.5 KHz. It also measures humidity (20–85%) and temperature (-10°C to 60°C / 14°F to 140°F). Please note that environmental conditions may cause a deviation of 0–15% in readings, which is considered normal. Powered by a built-in 2000mAh lithium battery, the desktop monitor supports 3–5 days of continuous use or up to a week on standby. The interface is user-friendly: press the left button to increase brightness, right button to decrease, and long-press 'M' to set the time. Temperature readings can be switched between Celsius and Fahrenheit. Each unit is calibrated and tested before shipment, so the battery may not be fully charged upon arrival. The battery indicator glows red while charging and turns green when fully charged. Color: White Material: Plastic Package Contents: 1 × Digital Decibel Meter Note: Colors may vary slightly due to lighting and display differences. Measurement error allowed: ±1–3 cm.