3M 7100099586 Hearing Protection Earmuffs, a revolutionary product with wireless connection and rechargeable Li-ion pack for a hassle-free experience. With an attenuation rating of 25 dB and CSA Class AL certification, it enhances safety in noisy environments. This hard hat attached earmuff boasts features like Bluetooth communication, external audio input, and two-way radio capabilities. It also offers level-dependent function for ambient listening and a dynamic microphone for seamless communication. With a durable hard hat mount suspension method and an auxiliary port, this product is built to deliver exceptional performance. Made by 3M, the industry leader in workplace safety, you can trust the quality and reliability of these noise attenuating headsets.