Features:<br /><br />1. Selected 40mm unit・ upgrade the efficiency of energy output・ provide you more dynamic and potent sound.<br />2. Unique sound chamber design・ stereo effect・ put you personally into the music world.<br />3. Bluetooth 4.1 version・ faster connection and stable signal・ could transmit high bit rate in high speed.<br />4. CVC 6.0 noise reduction・ it could reduce the outside interference effectively・ offer you clear phone call.<br />5. Long lasting battery・ built-in Lithium Polymer battery・ which applied low-consumption technology.<br />6. Strong compatiblity・ it could compatible with most of APP. With 3.5mm standard port・ you could enjoy with audio cable.Specifications:General Specification  Brand  NABOLANG  Model  BT-7  Color  Orange・ Green・ White  Wearing Type  HeadbandTechnical Parameters  Microphone  Yes  Bluetooth Version  4.1  Transmission Distance  10m  Receive Sensitivity  110dB  Impedance  32&amp;amp;Omega;  Frequency<br />  Response  20-20kHz  Battery Capacity  300mAh・ 3.7V  Charging Time (h)  About 3h  Taking Time (h)  Approx. 10hPackage  Included: 1* NABOLANG BT-7 Bluetooth Headphone 1* USB cable 1* Audio cable 1* Manual<br /><br />