... bluetooth chipset, hifi stereo sound effect.2.With IPX5 waterproof function, feel free to listen music even raining.3.With soft memory ... cord, can be changed shape around the ears.4.With NFC function, easy to finish the bluetooth ... timeAbout 100 hoursCharging portMicro USB typeColorsWhite/blackfunctionMicrophone, bluetooth, waterproof, NFC, voice promptStandard configurationCharging cable, ...