This headset with rounded curved design・ the overall design of the weight of the burden and the head from the head to be transferred to the neck・ to ensure a more comfortable wearing experience at the same time・ it can be easily on the shoulders. In the headset position completely in-ear design・ and the integration of wired headset and Bluetooth Features: <br />The earphones can stretch out and draw back<br />Bluetooth version: 4.0 version<br />Transmission distance: 10 mete<br />Support function: A2DP/AVRCP/HFP/HSP<br />Talk time: 12 hours Volume addition and subtraction /<br />Standby time: 200 hours<br />Charging time: 2 hours<br />Operating temperature: -10C to 60 C<br /><br />Package included: <br />Product standard: Bluetooth host + USB data cable + English manual + ear cap + soft box