... headphone CSR,Website:http://www.smartcoolproduct.com, Bluetooth 4.0, class 2* Bluetooth Profiles: Headset & Handsfree and A2DP/ ... Support simultaneously connecting to two mobile phones.* Support Various Bluetooth enabled devices, for example mobile phone, PDA, laptops, etc.* ... for Running,Gym, Hiking, outdoor SportsFunction characteristics:Bluetooth V4.0 version, CSR8635Support voice to answer the ...