3M 7000141055 Earmuff is an over-the-head style hearing protection with an attenuation rating of 24.0 decibels. These earmuffs provide noise attenuation and are designed for comfort and safety. They are not metal detectable and do not have electric insulation or dielectric properties. The earmuffs are corded, moisture-resistant, and noise attenuating. They have a CSA Class AL rating and are ideal for environments that require noise reduction. Bluetooth capability is not available. These high-quality earmuffs are made by 3M.