MSA Sordin Supreme Pro X with black cups - Neckband - Electronic Earmuff, slim-design MSA Sordin Supreme PRO X - US Military grade earwear The neckband allows for comfortable usage while wearing a helmet Noise Reduction Rating (NRR): 18dB - Great for hunters, shooters, and those working with loud machinery AUX input for connection to external radios, mp3 players, phones, etc. Quality made by MSA Sordin in Sweden!