http://en.wikipedia.org/wiki/Phone_connector_%28audio%29#TRRS_standards                   <strong>Brand:</strong> awei <br />             <strong>Model  :</strong> EST10Vi <br />             <strong>Color :</strong> Green, Red <br />             <strong>Wearing type :</strong> In-Ear <br />             <strong>Function :</strong> Microphone, Answering phone, Voice control                               <strong>Connectivity :</strong> Wired <br />             <strong>Connecting interface :</strong> 3.5mm <br />             <strong>Compatibility:</strong> HTC <br />             <strong>Application :</strong> Computer, Mobile Phone, Portable Media Player <br />             <strong>Plug interface:</strong> Full-sized <br />             <strong>Cable length :</strong> 1.2m <br />             <strong>Driver unit:</strong> 9mm <br />             <strong>Frequency response :</strong> 20~20KHz                                            <strong>Package weight:</strong> 0.104 kg <br />             <strong>Product size (L x W x H) :</strong> 120 x 2.5 x 1 cm / 47.16 x 0.98 x 0.39 inches <br />             <strong>Package size (L x W x H) :</strong> 19.5 x 9 x 3.5 cm / 7.66 x 3.54 x 1.38 inches                               <strong>Package contents:</strong> 1 x In-ear Earphone, 4 x Pair of Earbud, 1 x English / Chinese Manual, 1 x Cable Clamp, 1 x Carrying Bag                 <img src="http://des.chinabrands.com/uploads/2015/201501/heditor/201501301501432142.JPG" alt="Awei ES-T10Vi 1.2m Cable Length In-ear Earphone with Mic Volume Control for HTC" />