A single dynamic 30 ~ 130db 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 backlit 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 meter's LCD. The bi-directional USB port and software also enable control of the meter via it's on screen image. Accurate within ±1.4dB and meets or exceeds all other specs for an ANSI S1.4 and IEC 61672-1 Type 2 meter. Also features A/C and fast/slow weighting scales, minmax, over/under alarms, AC or DC recorder output and auto power off. Calibrate in compliance with OSHA using Acoustical Calibrator 850016. Comes in a foam lined, protective carrying case, complete with a windscreen, USB computer connection cable, software, instructions, calibration tool, recorder output plug, and 4 AA batteries which provide about 30 hours of use. The optional microphone extension cable enables remote measurements. Dimensions: 10¾" x 3½" x 1½" (272 x 83 x 42 mm); weight: 15 oz (420 g).