... ,High quality and stereo sound, Complete in specification,OEM design. Cheap Headphone with blister card packingProduct instructionPower indicatorPower ON/OFFCharging indicatorUSB portVolume ... centigradeBrief introductionXN-MP09 is a digital Hi-Fi stereo music headphone, compatible with MP3, WMA, WVA. It is available for or ... card or without it. MP3 mode appears when turning on headphone with card.