Want to test the sound level? Need to know the noise level for sound level control? Try this handy sound level meter, it's featured with wide measuring range that measures sound level from 30dBA~130dBA. It can be widely used for monitoring sound level in homes, office, schools, factories, traffic, audio system, construction site, etc. Features: Large LCD display with switchable backlight for easy reading, convenient to use. Wide measurement range from 30dB to 130dB, Resolution: 0.1dB, Accuracy: +/-1.5dB. With maximum/minimum value measurement and data hold function. Low battery indication, automatic & manual power off function.? Equipped with sponge ball. Compact and light, convenient to hold and carry. Portable and easy to use, suitable for checking, monitoring or controlling the sound level for personal, families, business, studies, industrial, etc. Specifications: Material: ABS plastic Display: LCD display with switchable backlight Measuring Range: 30~130dBA? Accuracy: +/-1.5dB Resolution: 0.1dB Frequency Response: 31.5Hz~8KHz Frequency Weighting Features: A weighting Sampling Frequency: 2 times/sec Microphone: 1/2" electret condenser microphone Operating Temperature: 0~40 celsius (10%~80%RH) Storage Temperature: -10~60 celsius (10%~70%RH) Power Supply: 3 * 1.5V AAA battery (NOT included) Auto Power Off: 10 minutes without any operation Case Size: Approx. 18.7 * 7.8 * 5cm / 7.4 * 3.1 * 2.0in Item Size: Approx. 49 * 30 * 159mm / 1.9 * 1.2 * 6.3in Item Weight: Approx. 110g / 3.9oz Package Weight: Approx. 179g / 6.3oz Packing List: 1 * Sound Level Meter 1 * User Manual (English)