Bluetooth earmuff with noise cancellation

Bluetooth connection : built in microphone for phone calls, and stream music from bluetooth devices
Hearing protection ：noise reduction protecting hearing 
Noise cancellation : automatically shuts off amplification when ambient sound reaches 82 dB.  Amplifies low-level sounds, reduce background noise. 
AUX input : connection to external MP3 or other audio devices.   
Rechargeable : includes USB port charge and indicator light to indicate charging status.