Feature:
Bluetooth V4.1
Portable lightweight and sweatproof design
Built-in microphone
Built-in rechargeable Li-ion battery
Multipoint pairing (connect 2 bluetooth device)
Support voice prompt ( in English)
support connect 2 bluetooth device in the same time.
Support reporting phone number when calls come.
Support HD music playing
Built-in 14.2mm nedymium driver
Clear bass resonance， CVC wind noise reduction， and superior sound isolation