Feature: 1. Three in One Multifunctional Sound Level Meter: Designed to meet the needs of most consumers, this sound level meter combines necessary functions of sound, temperature, and humidity measurement. 2. Large LCD Screen with Backlight for dB Readings: The digital sound level meter features a large, clear LCD screen with backlighting for easy viewing of measurements, reducing eye strain and enabling effortless reading even in low light conditions. 3. Fast Slow and Weighted Measurements: Response time of 125 milliseconds in Fast mode; 1 second response time in Slow mode with +/‑ 1.5dB accuracy and 0.1dB resolution. The A weighting simulates the frequency characteristics of low intensity noise for environmental noise detection. 4. Convenient and Portable Noise Meter: Ideal for various environments including noise engineering, product quality control, health monitoring, and therapy, this sound level meter is a versatile tool for inspecting, monitoring, controlling, and testing environmental noise levels. 5. Versatile Applications: Suitable for individuals, households, businesses, educational settings, and industries, this sound level meter is a practical instrument for measuring, monitoring, and evaluating sound levels in a wide range of settings. Specification: Item Type: Sound Level Meter Material: ABS Battery: Polymer Battery x 1 Battery Capacity: 1000mAh (Shipped with Built in Battery) Calibration Sound Source: 94dB at 1KHz Measurement Range: 30 to 130dB (A), 35 to 130dB (C) Accuracy: ±1.5dB (Reference Standard Sound Pressure, 94dB at 1KHz) Resolution: 0.1dB Frequency Weighting: A/C Frequency: 31.5Hz-8500Hz Time Weighting: Fast Slow Sampling Rate: Fast (8 times/s), Slow (1 time/s) Rated Current: 70mA Charging Time: 1.5h Usage Time: 8h Data Storage: 43000 . Package List: 1 x Sound Level Meter 1 x Windproof Sponge Ball 1 x User Manual 1 x USB Cable