1、SENSITIVE AND ACCURATE: The sound level meter use a capacitive microphone sensor for excellent sensitivity and accuracy 2、LCD BACKLIT DISPLAY: The digital sound level meter has a large, high strength backlit screen to easily cope with harsh environments such as bright light or at night 3、INTERFERENCE RESISTANT: Decibel meter has a windproof hood design, which can receive sound more accurately and filter the influence of wind on sound 4、WIDE FREQUENCY RANGE: With a frequency response of 31.5Hz‑8kHz, noise meter can measure a wide range of frequencies 5、PORTABLE AND CONVENIENT: Small and lightweight, this sound meter can be taken anywhere for on the go measurements Item Type: Sound Level Meter Material: ABS Battery: 3 x AAA battery(not included) Frequency Response: 31.5Hz-8kHz Measuring Range: 30-130dB Accuracy: ±1.5dB(94dB at 1KHz) Display Resolution: 0.1dB Operating Temperature: 0-40℃ Working Humidity: 10-90%RH Storage Temperature: -10 to 60℃ Storage Humidity: 10-75%RH 1 x Digital Noise Meter 1 x User Manual