http://tinyurl.com/n84kvn3Extech SDL600 Sound Meter SD LoggerProduct Review Click on the link for more reviews30 to 130dB measurement rangeHigh accuracy 1.4dB meets ANSI and IEC 61672-1 Type 2 standardsDatalogger date/time stamps and stores readings on an SD card in Excel format for easy transfer to a PCAC analog output for connection to an analyzer or recorder. Large backlit LCD displayAuto or Manual ranging
