ATP-Data-Logging-Sound-Level-Meter-SL-8852-ATP-SL-8852-P-Whether-you-are-testing-for-IEC-61672-1-Class-2-compliance-quieting-equipment-or-monitoring-the-roar-of-a-stadium-crowd-the-ATP-SL-8852-Precision-Sound-Level-Meter-can-get-the-job-done-P-P-This-model-provides-auto-ranging-&-manual-capability-from-30-to-130d B-in-three-convenient-measurement-ranges-with-an-accuracy-of-plusmn-1-4d B-A-frac 12-inch-electret-condenser-microphone-ensures-accurate-&-repeatable-readings-The-mode