Bluetooth Headphones, KONCEN X17 Bluetooth Wireless Headsets Noise Cancelling Headphones can replace the battery In-ear Stereo Earbuds With Mic for iPhone iPad iPod and Smartphones (Grey&Black) Easy Access: The simple user interface on one of the earphones allows you adjust the volume, play/pause, select songs and answer/hang up calls completely effortlessly. Music Bluetooth new subversion: Sports-style music Bluetooth V4.1 headset with the replaceable battery Double configuration capacity and the lasting music time reaches 16 hours Special noise reduction and give you a HD calling experience Clear and convenient communication: Voice telegraphing and acoustic answering. without manual operation.Say "YES" or "NO" answer decline a call KONCEN headsets are can quickly connect two different mobile devices within the effective range.