Features:
Headset uses the bone conductive speaker so the sound can pass though the skull directly to the auditory center, which eliminates many steps of acoustic transmission.
It can achieve clear sound reduction in a noisy environment, so as to release the ear licate tone function.
Stylish, ergonomic / Unique design.
Will provide better experience for listening than normal For Bluetooth headset
U-shape design, easier to fit your head.
Suitable for people who jog, run, cycle, etc.
Specifications:
For Bluetooth version: 4.0
Color: Black
Frequency range: 100Hz-18KHz
Transmission range: 10 meters
Transducer Sensitivity: 100±3dB
Microphone Sensitivity: -50±3dB
Playback Time: up to 5 hours
Standby Time: up to 15 days
Fully Charging Time: 1.8 hours  
Package includes: 
1* Headphone