Specification:<br /> <br />Easy use and carrying .<br />Light weight for all day comfortable.<br />Bluetooth 4.1 . high fidelity speaker・  stable performance and excellent call quality.<br />Built-in microphone・ Free call and listen music function.<br />Bluetooth Effective Distance:10 meters<br />Distortion degree:   1%.<br />Recharging voltage: 5 V.<br />Weight (kg): 0.08 KG.<br />Build-in rechargeable li-battery.<br />It has a microphone. you can talk to people using the Bluetooth earphone. please check. thanks<br /><br />Package including:<br /><br />1 x Bluetooth headset