Model Number: UA824-#3354 Brand Name: UYIGAO Key Specifications/Special Features: UA82 series noise meter has A wide dynamic rangeIt can be set the fast and slow time, there are A and B right to choose from, maximum lock, with backlit displayCompact portable, high-performance easy to useCan be used for family, residential area, plant area, urban environmental noise monitoring and more ModeUA824 Range 30-130 B Accuracy ±1.5dB Frequency response 31.5Hz-8kHz Resolution 0.1dB Microphone 1/2 in Frequency weighting features A and C Dynamic feature Fast/slow Maximum value lock √ Automatic range √ Backlight √ Low voltage warning √ Data store — USB — Power 9V battery Weight 150g Body size 154x68x26mm Accessories user's manual, warranty card, battery