3M 7100099584 hearing protection earmuffs provide a high level of safety and convenience in various environments. With an attenuation rating of 28 dB, they effectively reduce noise exposure. These earmuffs feature a wireless connection, allowing for easy and hassle-free communication via Bluetooth. The rechargeable Li-ion pack ensures long battery life of 8-12 hours. Additionally, they come with a neckband suspension method, making them comfortable to wear. The 4-pin XLR auxiliary port allows for external audio input. These intrinsically safe earmuffs are perfect for two-way communication and environmental listening.