This small and portable digital sound level meter is small and portable, which is designed to meet the measurement requirements of safety engineers, health, industrial safety offices and sound quality control in various environments like factory, school, construction, etc. Features: LCD display with switchable backlight for easy reading, convenient to use. Wide measuring range: 30-130dBA, Resolution: 0.1dB with fast responding. Min./Max./Data Hold function. Low battery indication, manual/auto shut off. Portable and easy to use, suitable for checking, monitoring or controlling the sound level for personal, families, business, studies, industrial, etc. Specifications: Material: ABS Sound Level Measuring Range: 30-130dBA Accuracy: 1.5dB(94dB@1KHz) Frequency Response: 31.5Hz-8KHz Frequency Weighting Features: A weighting Resolution: 0.1dB Working Temperature and Humidity: 040, 10%80%RH Storage Temperature and Humidity: -1060, 0%90%RH Power Supply: 3 * 1.5V AAA battery (NOT included) Item Size: 178 * 56 * 30mm / 7.01 * 2.20 * 1.18in Item Weight: 96g / 3.40oz Package Weight: 210g / 7.41oz Package Size: 22 * 11.7 * 4.2cm / 8.66 * 4.60 * 1.65in Package List: 1 * Sound Level Meter 1 * User Manual (English)