3M 7000002328 earmuffs provide over-the-head hearing protection with an attenuation rating of 21.0 decibels. With a product code of H6F/V, these earmuffs are designed in the shape of earmuffs and are not metal detectable. They are classified as CSA Class B and are not electrically insulated or dielectric. These cordless earmuffs are not moisture resistant and do not have Bluetooth capabilities. However, they are noise attenuating headsets and feature an over-the-head earmuff style. These high-quality 3M earmuffs offer reliable hearing protection.