The system helps ensure proper use of the devices and identifies the earplug models offering the best protection, such as the 3M E-A-R Classic earplugs and easy-to-use, push-to-fit earplugs, such as E-A-R Push-Ins.The E-A-Rfit Validation System includes all the hardware and accessories needed, including a speaker, software, stand, dual-element microphones, cables and a trial quantity of probed tes