About this item Fast and Easy Calibration: The Sound Level Calibrator is a convenient tool for quickly and easily calibrating sound level meters; microphones and sound measuring systems; It ensures accuracy and reliability for various types of sound instruments Accurate and Stable Performance: This calibrator utilizes solid state integrated circuitry; providing accurate and stable performance; It meets IEC942 Class I Versatile Applications: The calibrator is suitable for sensitivity calibration of microphones and can be used in both acoustics field and laboratory settings; It offers flexibility and precision in sound measurement Standard Levels and Frequencies: It generates standard levels and frequencies; with sound pressure levels of 94 dB and 114 dB; The calibrator ensures high accuracy with a deviation of only ±0.3 dB Convenient and Portable: The calibrator is battery operated and comes with an instruction manual and battery included; Its compact dimensions of 5.43 x 1.89 x 1.89 inch and lightweight design of 0.55lb make it easy to carry and use in various environments