Check the listing for details. EXTECH SDL600 Sound Meter/Datalogger 13X123. Condition: New. Listed at 801.50 USD. Sound Level Meter, Includes Hard Carrying Case, Microphone, SD Card, Windscreen, Digital Display Screen Type LCD with Backlight, Frequency Weighting A, C, Maximum Frequency Measurement 8 kHz, Maximum Sound Level Measurement 130 dB, Minimum Frequency Measurement 31.5 Hz, Minimum Sound Level Measurement 30 dB, Number of Records Stored 20,000,000, Sound Level Measurement Accuracy +/-1.4 dB, Sound Level Measurement Resolution 0.1 dB, Interface RS-232, SD Card, Features Data Logging The Extech(R) by FLIR sound level meter/datalogger records data on an SD card in Microsoft(R) Excel format. High accuracy +/-1.4dB with 30dB to 130dB measurement range. Auto or manual ranging. AC analog output for connection to an analyzer or recorder. Large backlit LCD display. Stores 99 readings manually and 20M.