Usage Tips:LARGE 13-INCH LCD DISPLAY: Equipped with a 13-inch LED screen, this Wall Hanging Sound Gauge offers adjustable brightness for clear visibility in various lighting conditions. It enables easy monitoring of sound levels, temperature, and humidity, making it ideal for diverse environments. INTEGRATED ALARM AND COLOR-CODED INDICATORS: This Sound Level Meter includes a built-in alarm that activates when sound levels exceed preset limits. It features color-coded indicators (green for safe, yellow for moderate, red for dangerous) to provide visual and audible alerts, enhancing hearing protection. MULTIFUNCTIONAL ENVIRONMENTAL MONITORING: Beyond sound measurement, this device also tracks ambient temperature and humidity. Its versatile design supports both desktop and wall mounting, making it perfect for use in classrooms, studios, offices, homes, and libraries. PRECISE NOISE LEVEL DETECTION: Featuring a high-precision sensor, the Noise Level Detector delivers accurate sound level readings from 30 to 130dB. Its reliability is ensured across various settings, offering consistent performance wherever used. USER-CENTRIC DESIGN AND ACCURACY: Designed for convenience, this Sound Decibel Meter offers selectable temperature units (°C/°F), 12/24-hour time display, and FAST/SLOW response settings. It maintains high accuracy within a large measuring range of 30-130dB at 1dB precision, ensuring accurate readings over time. Colour:White Material:plastic Package Contents: 1 x Noise Level Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.