Testo-0563-8170-Sound-Level-Measuring-Apparatus-816-1-Testo-0563-8170-P-The-top-of-the-range-Testo-816-1-sound-level-meter-complies-with-all-requirements-with-regard-to-the-execution-of-non-conform-noise-level-measurements-according-to-IEC-61672-1-Class-2-&-ANSI-S1-4-Type-2-This-makes-it-suitable-for-carrying-out-noise-level-measurements-in-the-workplace-public-places-industry-&-production-P-P-The-testo-816-1-has-all-the-features-which-its-little-brother-the-testo-816-has-but-als