WorkTunes Connect + Gel Ear Cushions Hearing Protector with Bluetooth Technology, Ear protection for mowing, snowblowing, construction, work shopsThis hearing protection product helps reduce exposure to hazardous noise and other loud sounds. Misuse or failure to wear hearing protectors at all times that you are exposed to noise may result in hearing loss or injury. For proper use, see user instructions.The next generation in WorkTunes hearing protection and entertainment, The 3M WorkTunes connect + gel cushions hearing protector with Bluetooth 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 hearing protectors allow you to stream The entertainment of your choice from your smartphone or other mobile device, while helping provide protection in noisy environments. Premium gel cushions provide enhanced comfort for your ears. The low profile and lightweight design is crafted with style in mind. Built-in comfort with baseball hat-compatible headband is excellent for extended wear. Whether you're using a circular saw or mowing the day away, reach for 3M WorkTunes connect +gel cushions hearing protector with Bluetooth technology to help make your workday entertaining and-most importantly comfortable. BUILT-IN LI-ION RECHARGEABLE BATTERY; charging cord included. COMPATIBLE WITH NON-BLUETOOTH DEVICES via 3.5m audio cable (not included). MAKES AN EXCELLENT GIFT for the yard or woodworking enthusiast. AC charging adaptor not included; device-compatible with standard USB chargers using supplied Micro USB cable.3M ALPHA1100 Rechargeable Li-Ion Battery Pack for 3M WorkTunes Wireless, Peltor Sport TacticalRechargeable lithium-ion battery pack with charge voltage capacity of 5.0V. This rechargeable battery pack is compatible with 3M WorkTunes wireless hearing protector with Bluetooth® technology and other hearing protection. Package includes USB cable and battery pack.