There is no loudspeaker set in earplug, which avoiding the direct harm to eardrum and brain brought by 1000 Guss permanet magnetic field and alternating magnetic field
2. Air Tube
It isolates mentioned above magnetic field and radiation source. Moreover, it lengthens the distance between mobile phone and human body, which largely decreases electromagnetic field
3. Metal Shield Wire
It is made of strands of fine and pure copper wire so as to prevent the transimisson of high frequency electromagnetic wave, achieving quite good anti-radiation effects. Besides, it strengthens the tensile strength and extends service life.