Portable, easy to use, 3½ digit digital sound level meter designed for simple one hand operation Meets the following standards: IEC 651-1979 Type 2, ANSI S1.4-1983 Type 2, JIS C 1502 Range: Lo Mode: 37db to 90db, Hi Mode: 75dB to 130dB. Accuracy: +/- 1.5dB (ref 94dB @ 1KHz). Two Time Weighing Options: S (SLOW): for normal measurements, F (FAST): for checking average levels of fluctuating noise A and C frequency weighting of the RMS signal: A: for general sound level measurement, C: for checking the low-frequency content of a noise This portable, easy to use 3½ digit digital sound level meter is designed for simple one hand operation, and can be mounted on a tripod for long-term measurement. Meter with A and C frequency weighting of the RMS signal, F and S time weighting and maximum level indication. General Specifications: Display: 3½ digit LCD with maximum reading of 1999 Measurement rate: One times per second, nominal Battery: 4x AAA Batteries (Included) Battery Life: 50 hours Included Accessories: Wind screen, 4x AAA batteries, plug, tripod mounting screw nut, carrying case Electrical Specifications: Standards: IEC 651-1979 Type 2, ANSI S1.4-1983 Type 2, JIS C 1502 Measurement Range: Lo Mode: 37db to 90db, Hi Mode: 75dB to 130dB Resolution: 0.1dB Frequency Range: 31.5 Hz to 8000 Hz Detector: True-RMS with independent frequency weightiness Dynamic Range: 55dB Maximum Hold decay time: