Feature:1. Digital Screen: The decibel meter adopts 13in large screen to clearly view the real time decibel level, temperature and humidity, with adjustable brightness.2. Alarm Prompt: The default alarm value for power on is 130dB. When the measured value exceeds the alarm value, the decibel meter will emit an alarm sound.3. Good Cooling: The meter back panel is designed with multiple heat dissipation vents, which is safe and durable, suitable for long term operation.4. Level Display Bar: With analog bar level indication, 6 bars noise decibel display, 30-75dB display is green, 76-130dB display is red, clear and intuitive.5. Easy Installation: The sound level meter is wall hanging, easy to install, and has a bracket, which can be placed on the desktop, for different scenes.Specification:Item Type: Sound Level MeterMaterial: ABS, LEDColor: BlackMeasuring Range: 30dB-130dBAccuracy: 1.5dB (subject to standard sound source, 94dB at 1KHz)Frequency Response: 31.5Hz-8.5KHzFrequency Weight: A WeightResponse Time: FAST, 0.5 SecondsSensor Type: 6mm condenser microphone sensorDigital Display: 3 DigitsResolution: 0.1dB (<100dB); 1dB (>100dB)Alarm Prompt Mode: Sound and DisplayAlarm Output: 12V High LevelRefreshing Speed: 2 times per secondPower Supply Mode: DC5V 1A Micro USB InterfaceWorking Temperature and Humidity: 0-40; Maximum 80% relative humidity, indoor altitude <2000 meterStorage Temperature and Humidity: -10-60, maximum 70% relative humidityOver Range Display: The highest position displaye Hi or Lo.Package List:1 x Noise Level Meter1 x Data Cable1 x Positioning Sheet2 x Hanging Hooks1 x Probe Pendant3 x Screws1 x User Manual