... 20MW;Power capacity: 100mwWire: 2.2 ± 0.15mPin size: 3.5mm stereo; Headphones sensitivity: 58dB ± 3dbMicrophone impedance: 2.2KΩ ... , back hanging earphone, light design, easy to wear;3, hi-fi speakers, pure sound;4, non-toxic environmentally, halogen-free ... TPE cable, durable and tactile;5, metal microphone, facilitate dialogue;6,3 ...