This Real Time octave band analyzer includes Windows compatible software, a USB cable, four C batteries, microphone windscreen, mini screwdriver, 120 V AC adaptor, and a case. Its range is 30 to 130 dB with an accuracy of +/- 1.5 dB, and a frequency range of 25Hz to 10kHz. Its condenser microphone is 1/2 inch with a fast, slow, 10ms, and impulse response. It also counts up to 9,999 and records up to 24 hours. Includes a one-year manufacturer's warranty.