: N.I.S.T. traceable certificate of calibration available (for Sound only; Certified model only)

 : Simply place the calibrator on to the digital sound meter’s microphone, turn on the calibrator, and adjust the decibel meter's reading to either 94 or 114 dB. Operates at a frequency of 1KHz ±4% and with an accuracy of ±0.5 dB. Built in battery check. Easily portable for field use, it comes with a carrying case, adaptors for 0.5 and 1" microphones, instructions and a 9-volt battery. It conforms to ANSI S1.4-1984 and IEC942 1988 Class 2 standards for acoustical calibrators. 5-year warranty.

 : 5-year warranty. Comes ready to use in a soft carrying case with RS232 computer port, instructions, 6 AAA batteries, easel back, and a tripod screw.