This sound level meter comes with a calibration certificate, 9-volt battery, windscreen, and carry case. Its range is 30 to 130 dB with an accuracy of +/- 1.4 dB, and a 0.1 dB resolution. Its frequency range is 31.5Hz to 8kHz and frequency weighting is A or C. It has a 1/2-inch electret condenser microphone and an LCD display. It operates in temperatures between 0 Degrees C and 40 Degrees C.