FDM-02 High-Precision Digital Handheld Professional Decibel Meter Instrument Features: Multi-function display on the same screen: Capacitive microphone + high- for precision temperature and humidity sensor, accurate and reliable data Curve recording makes noise visualization: switch to curve mode, you can clearly see the noise changes in a period of time A/C dual-weighted measurement can measure more diverse environments, A/C weighting characteristics, making the measurement more professional. Real-time measurement for instant response, fast and slow time weighting, one-button switch 1.25S fast measurement, more stable, easy to obtain noise level Specifications: Part name: FDM-02 high- for precision noise meter Material: ABS Size: 138*63*28mm Screen: 2.0-inch TFT screen Display: 4 digits, resolution 0.1dB Frequency weighting characteristics: A and C Time weighting characteristics: fast (FAST) 125 milliseconds; slow (SLOW) 1 second Frequency response: 31.5Hz-8.5KHz Dynamic scale display/value update fast 0.5 times/second; slow 1 time/second Dynamic range: 3.50dB Accuracy: ±1.5dB (based on standard sound source, 94dB@1KHz) Measurement range: 30dB~130dB Alarm record: 30 items, record high and low threshold time and type Brightness setting: 5%-100% adjustable, step 5% Curve interface: 0.5S update once Overload indication: high report, low report Wide value setting: minimum 0.0dB, maximum 130.0dB Language switching: support (Chinese/English) Style mode: dual style switching (day/night) Date clock: year, month, day and time Sleep setting: sleep brightness adjustable, sleep time adjustable Auto shutdown: auto shutdown time adjustable 1-60min Battery: 1500mAh/3.7V lithium battery Package includes: 1*Decibel Meter 1*Charging Cable 1*Storage Bag Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.