mini bluetooth earphone wireless in-ear invisible auriculares earbuds handsheadset stereo with mic for phone

active noise-cancellation : yes style : in-ear wireless type : bluetooth connectors : none communication : wireless vocalism principle : dynamic volume control : yes frequency response range : 20-20000hz function : for mobile phone function : hifi headphone function : for ipod function : sport function : common headphone sensitivity : 122±3db is wireless : yes plug type : wireless codecs : none support memory card : no with microphone : yes