The Triplett SLM400-KIT Sound Level Meter with Calibrator Kit can be used to test and verify sound levels for worker safety (OSHA) and community noise ordinances at night clubs/concerts, airports, mines, athletic events, construction sites, vehicle testing, wind farms, new product noise reduction, and other applications. The Sound Level Meter meets IEC 61672-1 type 2, ANSI S1.4 Type 2 with +/-1.5dB accuracy. It features a 35 to 130dB range plus A and C weighting with selectable fast/slow response time. The included calibrator fits 1/2" diameter microphones and has selectable 94dB and 114dB output with +/-0.5dB accuracy. Calibrator output frequency is +/-4%@1kHz. The kit includes Type 2 Sound Level Meter with 9V battery and windscreen plus Sound Level Calibrator with 9V battery and hard carrying case.