3M 7100099581 is a wireless neckband-style earmuff offering an attenuation rating of 28 dB for effective hearing protection. It features a rechargeable Li-ion pack for a battery life of 11 hours. With Bluetooth capabilities, it enables communication via external 2-way radio and includes an auxiliary port for connecting with a 4-pin XLR. This intrinsically safe device also offers level dependent function for ambient listening and includes a dynamic microphone for clear communication. However, it does not have a built-in FM or AM radio.