... earphone, etc *with microphone *double plugs *handsfree, in-ear Computer earphones, Laptop earphones, Notebook computer earphones, PC earphones, ... which it is can maintain the curve of human ear, wear comfortably, very user-friendly. Green: All ... hearing protection. Only +/-1.5dB difference of two ears, uniform and mixed, avoid the hearing-impaired. Ear-protect: do not hurt the ear or losses hearing ...