[Decibel Data Logger to PC] The digital sound decibel meter can record 32000 sets of data, and the data recording function is compatible with compatible with 10, 8, 7, Vista and XP. [Bar Graph Display] LCD digital display can display 3-digit decibel level value, auto-range bar graph level, time and date. [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. [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. Our noise decibel meter with PC interface is compact and easy to use while giving you accurate readings over a range than comparable cheap sound meters (30 dB to 130 dB with an accuracy of +/-1.5dB and a resolution of 0.1 ). market. This noise tester offers data logging capabilities and compatible software (included in the kit) to capture data to a PC. Power Supply:4 x AA;1.5V battery(Not included batteries) Colour:Black Material:abs Package Contents: 1 * Noise meter 1 * Data cable 1 * Reading CD Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.