Featuresr made of high quality square wire difficult to knotr you can use it answer phone and volume adjustment very convenient not support parts of phoner with microphone meet your different demandr two formats one is for iphonexiaomihtclgsamsung etc another is for huaweiztelenovo etcr compatible with most 35mm jack electronic devicesr safe high grade material good qualityr 35mm jack plug comfortable user high sensitivity good sound qualityr light weight convenien