Fashionable High Quality In-ear Earphone white with Microphone for Laptop/Desktop  Iphone 4/4s /Ipad

Microphone Unit:
Diameter: 6*2.7mm
Directivity:All
S.P.L:-52±3dB
Impedance:≤2.2Ω
Frequency Response:30Hz-16,000Hz
Operating voltage:3V
Speaker:
diameter:16mm
Impedance:16Ω
S.P.L:114dB S.P.L.at1KHz
Rated power:20mW
Aggregate capability:40mW
Frequency Response:20Hz-20,000Hz
Cable Length:2.2±0.15m
Plug Type:3.5mm