3M 7100203302 Protective Communication Earmuffs offer an impressive attenuation rating of 25 dB, guaranteeing optimal hearing protection. These earmuffs feature a wired connection type and are CSA Class BL certified. Designed with a hard hat attachment, they ensure comfort and convenience. With a net weight of 224 g, they are lightweight yet robust. The Listen Only communication type allows for effective communication, and the earmuffs also provide external audio input. Additionally, these earmuffs are compatible with external 2-way radios. Manufactured by 3M, they have a dynamic microphone class/type, making them a reliable choice for all your communication needs.