Soaiy&reg; 14 Day Standby,bluetooth 4.0 Stereo Wireless Headset Handsfree Headphone for Apple Iphone 5s/5c/5,iphone 4s/4 and Samsung Galaxy S5/s4/s3,lg and Other Bluetooth Device, Talking No Delay (Black) The latest Bluetooth 4.0 (fully backward compatible),up to 320 hours (14 days) of standby time,Up to 7 hours of talk time,Up to 5 hours of music play time. Voice report function,When you receive a calling, The Bluetooth headset read the incoming call number. iPhone displays headset battery meter. Digital Noise-reduction of DSP and noise-cancelling microphone,reduces background noise and echo ensuing a clear and natural communication. Supporting Multi-point, and allowing one Bluetooth headset connecting two mobile phones at same time.