3M™ E-A-Rfit™ Validation System is objective fit-testing system to validate the fit of 3M™ earplugs. Provides a Personal Attenuation Rating (PAR) for each worker. Benefits •Objective test takes only 10 seconds per ear for 7 standard frequencies •Test results are documented for each subject and can be printed or saved electronically for future reference •Free online training and user support •Requires probed test plugs •Includes Software, Speaker And Impact Resistant Carrying Case.