1,Airline earphone 2, MP3/MP4 earphone 3, ISO 9001 2000 Certificate 4, Any color is available 5, OEM/OBM/OD Airline earphone for noise cancelling functionPlug3.5*4.5*20.5Cold Test-20±2°C,16H tested and well back to normal temperature 2HHot Test60±2°C,16H tested and well back to normal temperature 2HHumidity test40±2°C, RH 90%~95% 16H tested and well back to normal temperature 2Hplastic ...