Enjoy the ultimate in style, comfort and listening pleasure with Massi Earphone Massi 30 Degree Ergo fit Earphones,with special shape like a Loudspeaker.The ear shell is made of aviation aluminium and processed with multi-angle precision cutting technology,fine matte surface treatment,and special two-step anodization.Excellent Sound Quality,Ergofit Design for Ultimate Comfort and Fit,Wide Compatibility, and built-in remote mic make this earphones good for music listening or calls. Chat or Music,just with handfree earphones One click:Play/pause music,Answer/End Calls Double Clicks:next track Three Clicks:Previous track Technology Specification Trumpet type:Single moving coil Sensitivity:95±3dB Impedance:32Ω Frequency response:20-20000Hz Cable length:120cm Plug Pin:3.5mm