Work and talk wirelessly without compromising your hearing protection with Howard Leight Sync Wireless Bluetooth Electronic Earmuffs. Featuring Bluetooth 4.1 connectivity, this premium earmuff allows you to make and receive calls in loud environments (and actually hear them) while keeping your ears protected. Your phone stays in your pocket, leaving your hands free to work throughout the call. You can also stream music wirelessly without using potentially dangerous wires or cables. The boom mic delivers crystal clear communication and rotates away easily when not in use. From a hearing safety standpoint, Sync Wireless Earmuffs employ Volume Management Technology and Air Flow Control Technology to deliver a Noise Reduction Rating (NRR) of 25. The durable headband features a tough steel core but is padded (along with the ear cushions) for all day comfort. The rechargeable battery lasts 16 hours or more when fully charged. Package includes the Sync Wireless Earmuff, a USB charger with wall adapter, and a 3.5 mm AUX cable.