The Triplett SLM4 Sound Level Meter can be used to test and verify sound levels for worker safety (OSHA), community noise ordinances, night clubs/concerts, airports, mines, athletic events, construction sites, vehicle testing, wind farms, new product noise reduction, and other applications. The sound level meter meter meets IEC 61672-1 type 2, ANSI S1.4 Type 2 with ±1.5dB accuracy. It features a 35 to 13dB range plus A and C weighting with selectable fast/slow response time. Includes 9V battery and windscreen, and hard carrying case.