Features: Large LCD backlight display for clear reading, convenient to use at night. Wide measuring range: 30-130dBA, Fast Responding. Sound level measurement with stable and reliable performance. Min./Max./Data Hold function and OVER warning sign of over range measuring. Low battery indication, manual/auto shut off. Equipped with sponge ball. With mounting hole of tripod, allowing to be placed on the stand, easier measuring when your hands are busy. Portable and easy to use,suitable for sound quality control in factory, traffic, car, baby room and audio system office, home, school and construction site. Specification: Model: WT85 Color: White + Blue Material: ABS Plastic Measuring Range: 30-130dBA Accuracy: ±1.5dB Resolution: 0.1dB Frequency Response: 31.5Hz to 8KHz Frequency Weighting Features: A Weighting Display: LCD Display Over Range: LCD Show OVER Power Supply: 3 * 1.5V AAA Batteries(Not Included) Operation Environment: 0-40℃ 10-80%RH Storage Environment: -10-60℃ 0-90%RH Size: 55*30*177mm/2.2*1.2*7in Weight: Approx.177g/6.2oz Package list: 1 x Digital Sound Meter( Batteries Not Included) 1 x User Manual 1 x Sponge Ball 1、Large LCD backlight display for clear reading, convenient to use at night. 2、Wide measuring range: 30-130dBA, Fast Responding. 3、Sound level measurement with stable and reliable performance. 4、Min./Max./Data Hold function and OVER warning sign of over range measuring. 5、Low battery indication, manual/auto shut off.