Advance MU1 Earphone Hifi Stereo Headphone Headset Features Design accord with human body engineering,wearing a simple way the overall simple compact,easy to carry Product meet the latest environment protection standart all raw materials non-toxic no halogen use at ease safe 1.2 m standart high quality wire, soft and comfortable flexible use USES high grade antioxidant OFC enamelled copper wire,the signal propagation speed,small distortion the sound quality more perfect Standart 3.5 mm stereo plug straight wide application scope.Pin and hardness strong PP with copper alloy material plug greality extented servise life