This Mini503 Wireless Stereo V4.0 Bluetooth Back-mounted Sporty Headphone is a must-have for your sport, such as jogging, skating, mountaineering, etc. Adopting imported and superb CSR Bluetooth smart chip, this headphone ensures stable Bluetooth receiving. Besides, wireless design is great to get rid of twined cable and and make you enjoy wireless experience. Three-dimensional buttons design for convenient and quick use. With making calls function, you just press the button if comes in call during listening music. It is applicable to desk computer, PC, tablet PC, mobile phone, etc. In addition, back-mounted design does not exert influence to sport, making calls. What are you hesitating for?<!--Features --><p>FEATURES</p><ul><li> Support V4.0 Bluetooth wireless play and transmission</li><li> 10m wireless transmission range</li><li> Support high-quality stereo play</li><li> 40mm neodymium speaker</li><li> Ultra long calling time and standby time</li><li> Suitable for all mobile phones with Bluetooth function and computers</li><li> Mini and compact design for convenient carry</li><li> Foldable steel is retractable and comfortable to wear </li><li> Soft and permeable earmuff </li></ul><!--Specifications --><p>Specifications</p><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td width="131"> Speaker Diameter</td><td width="365"> 1.57" / 4cm</td></tr><tr><td width="131"> Sensitivity</td><td width="365"> 105dB S.P.L at 1KHz </td></tr><tr><td width="131"> Frequency Response</td><td width="365"> 20Hz-20,000Hz </td></tr><tr><td width="131"> Rated Power</td><td width="365"> 25mW</td></tr><tr><td width="131"> Bluetooth Version</td><td width="365"> V4.0 </td></tr><tr><td width="131"> Transmission Power</td><td width="365"> Class 2 </td></tr><tr><td width="131"> Radio Frequency</td><td width="365"> 2.4-2 .48GHz </td></tr><tr><td width="131"> Transmission Distance</td><td width="365"> 10 Meters </td></tr><tr><td width="131"> Charging Time</td><td width="365"> 3 Hours </td></tr><tr><td width="131"> Talking Time</td><td width="365"> 10 Hours</td></tr><tr><td width="131"> Music Playing Time</td><td width="365"> 10 Hours</td></tr><tr><td width="131"> USB Cable Length</td><td width="365"> 23.62" / 60cm</td></tr><tr><td width="131"> Battery</td><td width="365"> 3.7V, 260mAh</td></tr><tr><td width="131"> Weight</td><td width="365"> 1.55oz / 44g</td></tr><tr><td width="131"> Color</td><td width="365"> Coffee</td></tr><tr><td width="131"> Compatible with</td><td width="365"> Universal</td></tr><tr><td width="131"> Dimensions</td><td width="365"> (12.59 x 1.77)" / (32 x 4.5)cm (L x Dia.) </td></tr></tbody> </table><!--Package Includes --><p>Package Includes</p><ul><li>1 x Bluetooth Sports Headset</li><li>1 x USB Cable</li><li>1 x User Manual</li></ul><!--Extra Info --><!--produts_compatibility -->