- The ULTRX™ Earmuff brings together top-notch sound, comfort, and safety. Providing superior hearing protection, the earmuffs ensure a Noise Reduction Rating (NRR) of 23dB, ensuring your ears are shielded from harmful noise levels. Compliant with CE EN 352-2 standards, these earmuffs are built for your safety and comfort. Featuring a single high-frequency microphone, it amplifies sounds, allowing you to stay connected with your surroundings. Worried about your hearing? Don't be! The built-in microphone intelligently shuts down at 82dB, safeguarding your hearing. Operating on just a single AAA battery, these earmuffs are compact with a foldable design making them portable, so you can carry them wherever you go. Invest in the ULTRX™ eMuff today and experience the perfect blend of safety, functionality, and convenience for your ears.