MSA/Mei Si An 10108383 Over-the-Head Intelligent Electronic Noise-Canceling Earmuffs Product Name: MSA/Mei Si An 10108383 Over-the-Head Intelligent Electronic Noise-Canceling Earmuffs Product Features: Brand: MSA/Mei Si An Model: 10108383 Name: Noise-Canceling Earmuffs MSA/Mei Si An 10108383 Over-the-Head Intelligent Electronic Noise-Canceling Earmuffs, an upgraded product of professional intelligent earmuffs; inherits the advantages of Mei Si An's left and right earmuffs, and is equipped with excellent intelligent noise reduction circuits to ensure outstanding sound quality; Capable of filtering noise while enabling short-distance voice communication: The product complies with the EU EN352 standard; MSA/Mei Si An 10108383 Over-the-Head Intelligent Electronic Noise-Canceling Earmuffs Intelligent noise filtering and external voice amplification, allowing for short-distance voice communication, with power-saving mode and low battery alarm function; equipped with a 3.5mm stereo jack, compatible with most audio device interfaces; SNR 27dB.