[Exquisite structure, high accuracy] Wide measurement range of 30-130dB decibels, accuracy of +/-1.5dB, and resolution of 0.1dBA. [ Output] AC signal output: 4Vrms/full barometer, output impedance is . 600 ohms. DC signal output: 33mV/dB. [Bar Graph Display] LCD digital display can display 3-digit decibel level value, auto-range bar graph level, time and date. [Decibel Data Logger to PC] The digital sound decibel meter can record 32000 sets of data, and the data recording function is compatible with for 10, 8, 7, Vista and XP. [Wide Application] The noise pressure decibel meter is compact and easy to carry, and is widely used in offices, classrooms, noisy neighbors, environmental measurements, etc., Manufacturer: Jnchdghwa