Model Number: UA824 Brand Name: UYIGAO Key Specifications/Special Features: UA824 series noise meter has wide dynamic rangeCan be set fast and slow time, there are A and B right to choose from, maximum lock, with backlight displayCompact portable, high-performance easy to useCan be used for family, residential area, plant area, urban environmental noise monitoring ModeUA824 Range 30-130B Accuracy ±1.5dB Frequency response 31.5Hz-8kHz Resolution 0.1dB Microphone 1/2 inches Frequency weighting features A and C Dynamic feature fast/slow Maximum value lock √ Automatic range √ Backlight √ Lowbattery warning √ Data store — USB — Power 9V battery Weight 150g Body size 154x68x26mm Accessories user's manual, warranty card, battery