3M 7100088458 Protective Hearing earmuffs provide 21 dB of attenuation, ensuring reliable hearing protection. With a wired connection and 100-hour battery life, these headphones are perfect for environmental listening. The headband suspension method and lightweight design (303 g) offer comfort throughout long periods of use. The earmuffs also feature a 3.5mm auxiliary port for external audio input, a level-dependent function for ambient listening, and noise attenuating headsets. However, they do not offer Bluetooth or built-in 2-way radio functionality.