Description: The sound level meter is versatile device for measuring sound strength in an acoustic environment-loud or soft; high pitched, low-pitched, intermittent or continuous. This meter can be used in measuring noise of various occasion such as factory, office, home, traffic route, acoustics, air-conditioner, refrigerator, etc. You can test surround sound system to see exactly how much sound each to see if any adjustments need to be done. Features: Super large 9.6" LCD digital display with backlight that makes reading more clear and visually in dark areas. Alarm function. When the measuring value is over the alarm value, the meter will make a sound beeping and lock the data with blinking for 2 minutes. Data storage. The instrument will automatically store the data every 2 seconds, and the stored value is the largest noise value in 2s, which can last for one year. Connecting computer with USB cable, you can down-load records, collect samples and print chart and date,etc. Wall hanging type. With the hanging hole, it can installed on the wall to or free stand on the table. Application: families, factories, offices, hotels, hospitals, laboratory, theaters and audio systems, etc. Specification: Model SW-525B Accuracy ±1.5dB Measurement Range 30~130dB Frequency Response Range 31.5Hz~8.5KHz Frequency Weighting A Response Fast Resolution 0.1dB(<100dB), 1dB(>100dB) Alarm Reminder(sound+display) Yes Alarm Output Yes Storage Function 2secs/time, can be stored for a year Communication connecting PC via USB cable Working Temperature/Humidity 0-40℃, 10%~80% Storage Temperature/Humidity -10-60℃, 10%~70% Characteristics Material Plastic, Metal Color Black Power DC 5V 1A micro USB Product Size(appr.) 228x125.5x32mm / 9.0x4.9x1.3inch Package Weight(appr.) 612g Accessories USB Cable, User Manual, CD Package Included: 1 x Sound Level Meter 1 x USB Cable 1 x User Manual 1 x Warranty Card Warning: 1. Do not use meter in high temperature and high humidity environment. 2. Do not use meter near corrosive material. 3. Do not use meter in the conditions that should be splashed by water. 4. Do not use meter in heavy dust environment. 5. Do not use meter in an environment with chemical gas. .