**Rewritten Description:** 13-inch LCD Display: Features a 13-inch LED screen with adjustable brightness for clear visibility in any lighting. Easily monitor sound levels, temperature, and humidity in various environments. Alarm & Color Indicators: Built-in alarm activates when sound exceeds preset limits. Color-coded indicators (green/yellow/red) provide visual and audible alerts for hearing protection. Multi-Environment Monitoring: Measures sound, temperature, and humidity. Suitable for desks or walls, ideal for classrooms, studios, offices, homes, and libraries. Precise Sound Detection: High-accuracy sensor measures sound levels from 30 to 130dB with reliable performance in any setting. User-Friendly Design: Selectable temperature units (C/F), 12/24-hour time display, and FAST/SLOW response settings. Accurate within +/-1dB across a 30-130dB range. Color: White Material: Plastic Package Includes: 1 x Noise Level Detector Note: Slight color variations may occur due to lighting or display differences. Measurement tolerance: +/-1-3cm.