Advanced Datalogging Sound MeterA single dynamic 30 ~ 130 db range eliminates the need to manually select ranges and prevents data errors during range changes in auto ranging models. All test parameters are simultaneously displayed on a large bright back lit display featuring 0. 1 dB resolution and a bar graph. Automatically log up to 31,000 records for later download, or manually save and recall 99 data points, with date and time stamp, directly on the meters LCD. The bi