Harmonics Klip 2, the Bluetooth wireless earphones on a clip comes with a voice calling feature for easy dial-outby just pressing the button and speaking the name.; Clip the Bluetooth headset to you clothing or wear it around your neck using the included lanyard.; s universal Bluetooth headset is compatible with all Bluetooth enabled phones including Android smart phones and iPhones.; . Harmonics Klip 2 has a 100mAh inbuilt battery which offes a talk time of 6 hours and music time of 7 hours with 120 hours of standby time.; It can be charged in less than 2 hours. It comes with rechargeable Li-Polymer battery.