Sound calibrator is suitable for setting standard noise levels at 94 dB and 114 dB. The instrument has an output frequency of 1 kHz, ±4%, and it functions best when environment conditions have a temperature of 20°C, relative humidity of 65%, and atmospheric pressure of 29.9 Hg (1013 mbar). The instrument features measuring accuracy of ±0.5 dB, a low battery indicator, and a 1/2 microphone adapter. A compact design allows the user to conveniently operate and store the product. At 283 g, including the battery, it is also extremely lightweight. Each unit includes carrying case, 9V battery, and instruction manual.