Aluminum Headsets,TOP PLUS In the Ear Headphone 3.5mm Wire Earphone With Microphone and Intelligent Selfie and Volume Control Earphone for Samsung Android System Smartphone (silver) Aluminum alloy metal cavity can effectively reduce the negative effects of the cavity resonance on sound quality, Give you a more accurate clean sound. Bending the ear-canal design, Conform to the human ear ear-canal construction, Have a comfortable wearing experience. The universal standard 3.5 mm plug design with strong compatibility can effectively reduce the attenuation ,Keep pure sound . Intelligent Selfie and Volume control Button compatible with Android System well ,give you high definition sound and calls.Note:this earphone can't control Selfie and volume for apple cell phone or IOS System It is also with High Performance Mic provides clear voice, the control unit is easy to press with long service life.