3M 7100099844 earmuffs are designed for hearing protection with an attenuation rating of 31 dB. These wired earmuffs feature a headband style for comfortable and secure fit, along with noise attenuating headsets. They support communication via a two-way radio, offering clear audio for communication purposes. The earmuffs have a flex auxiliary port but do not support external audio input or level dependent function for ambient listening. No built-in FM or AM radio is included. These reliable and durable earmuffs are a great choice for those seeking hearing protection with communication capabilities.