RC Professional Decibel Meter/Sound Level Reader(Advanced,White) Measurement Range: 30 dB TO 130 dB; Measures in both dBA and dBC frequencies Internal Storage Capacity of 4700 data points; Includes analysis software for Windows based PC's Accuracy Within +/- 1.5 dB; Adjustable Sample rate preset to 20x/second Requires 4 AA Batteries - Included! Can be powered with 6V DC Wall adapter Not Included 1 Year warranty(Software for windows use ONLY!)