The 3M WorkTunes Connect Hearing Protector with Bluetooth wireless technology combines a modern, comfortable design with high-fidelity sound quality This innovative hearing protection lets you conveniently make and take phone calls, the low profile and lightweight design is crafted with style in mind Equipped with Bluetooth Wireless Technology, these ear-protective headphones allow you to stream the entertainment of your choice from your smartphone or other mobile device, while providing hearing protection in noisy environments Built-in comfort features such as soft ear cushions and a hat-compatible headband are excellent for extended wear Whether you're using a power saw or mowing the day away, this hearing protector will help make your workday entertaining and most importantly comfortable It has NRR of 24 dB (Noise Reduction Rating) with high-fidelity speakers that provide premium sound quality With integrated microphone lets you make and take phone calls without removing the hearing protection Cord and antenna-free design lets you move easily on the job and simple single-button interface allows you to stay focused on the job