3M 7100099790 hearing protection earmuffs offer a wireless connection, making communication easy with Bluetooth capability. They provide an attenuation rating of 28 dB to protect your hearing. The headband style and suspension method ensure comfort during use, while the rechargeable Li-ion battery lasts for 11 hours. These earmuffs also offer features like external audio input, two-way radio communication, and ambient listening. With CSA Class A certification and a dynamic microphone, these 3M earmuffs are a reliable choice for noise attenuation and communication needs.