User-Friendly Design: Features a large LCD digital display with a backlight for easy reading in both bright and dim lighting conditions. Wide Measurement Range: Measures 30~130dB (A) and 35~130dB (C) sound levels, covering a broad spectrum of sound pressure from low to high levels. Power-Efficient & Equipped with an auto shut-off function to conserve battery life, powered by 4 AAA batteries (not included) for long-lasting usage. Versatile Application: Ideal for use in neighborhood noise complaints, offices, industrial environments, and more, to monitor noise pollution and ensure safety standards. Perfect for industrial noise control, neighborhood monitoring, audio calibration, and health and safety assessments.