3M™ WorkTunes™ Connect Wireless 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. 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. The low profile and lightweight design is crafted with style in mind. 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, reach for 3M™ WorkTu¬nes™ Connect Hearing Protector with Bluetooth® wireless technology to help make your workday entertaining and–most importantly ¬comfortable. CAUTION: 3M strongly recommends fit testing of hearing protectors. Research suggests that many users will receive less noise reduction than indicated by the NRR due to variation in hearing protector fit, fitting skill and motivation of the user. If the NRR is used, 3M recommends that it be reduced by 50% or in accordance with applicable regulations. Soft conformable ear cushions and low-profile cups for a comfortable fit. Auto shut-off feature with low-battery indicator. Built-in rechargeable battery; charging cord included. 30+ HOURS OF BATTERY LIFE PER CHARGE.