ViCAN H903 Wireless Bluetooth HeadphonesNoise Cancelling Running Stereo Headsets with Microphone and Volume Control (Black) Bluetooth4.0CSR8635chipsetsupportCVC6.0noisecancellationandApt-Xaudiotechnologyprovidepure,CD like high quality sound for compatible devices. Twopowerfulaudiodriversoneachsideofferingbalancedaudioandcrystalclearsounds,providingacomfortableanddynamiclisteningexperience. Builtin110mAhrechargeableLi-ion battery of high performance works on supporting up to 8-hour music streaming and 7-hour talking, you can get it fully charged less than 2 hours. Itbuilt in high-quality microphone for hands free call. Connect two mobile phones at the same time and voice-activated answer. Compatible with all Bluetooth-enabled devices such as iphone 6s 6 ipad ipod, Samsung Galaxy S6 Note 5, Android/iOS Smartphone, tablet PC, laptop, etc. EQautomationtomeetthedemandsofvariouscustomerslikeclassicalmusic,newage,pop,rocksonganddance