... best quality products and the enjoyment of happy lives. 1.earphones used for MP3,MP4,CD,phone,computer good design and ... logo available.4.Best, timely after-sales serviceFactory Direct,OEM.earphones used for MP3,MP4,CD,Iphone,computerProduct sepecifications:1.style ... diaphragm:9U4.sensitivity:94dB+-3dB(when inputting 1 kHz 1mw) (V-input=178mV)5.frequency respone:20-20.000Hz6.MAX input ...