SNDWAY SW-525A is a highly accurate and versatile decibel meter that measures sound intensity in various acoustic environments. It has a measurement range of 30~130dB with an accuracy of +1.5dB. It features a condenser microphone sensor, fast response time, and A-weighted frequency response. The device has a data storage function for up to one year, and data export function. It is suitable for measuring noise in factories, offices, homes, and traffic routes.Features:Measurement range 30 ~ 130dB (dB)Accuracy: +1.5 dB (reference sound pressure level, 94dB @ 1kHz)Dimensions: 210 * 130 * 30MMFrequency response: 31.5Hz ~ 8.5kHzfrequency weighting: AResponse time: FastAlarm switch indicator/Condenser microphone sensorMicrophone: 1/2 inch condenser microphoneDigital Display: 3pcs 3-inch digital tube display threePower supply: DC 5v 1A micro USBworking environment: 0 - 40 degrees (32 degrees Fahrenheit to 104 degrees Fahrenheit), 10 - 80%RHStorage of Temp. and humidity: -10~60C. 10~70%RHSpecial Function:1. Data Storage Function, For one year, 2 seconds per data2. Data Export FunctionPackage content:1 x SW-525b sound level meter1 x Warranty1 x Mnual1 x CableDC 5v 1A micro USB cableThe Sound Level Meter is versatile device for measuring sound intensity in an acoustic envieronment-lound or soft; high pitched, low-pitched, or Broad-band; inter-mittent or continuous, This meter can be used in measuring noise of various occasions and addpiances such as factory, office, home, traffic route, acoustics, air-conditior refrigerator, etc....