High quality sound type mobile phone earphone microphone with large diameter 0.5 inch (13 mm). The switch part with built-in microphone is small, so it does not get in the way when you install it. High quality sound model that reproduces sound from bass to treble. The head part is an aluminum body that is renowned for its high-quality sound quality. In-ear type with high sound insulation. Adopts a small built-in microphone switch that does not get in the way when installed, and supports voice calls. Retractable cord for smart storage of cords.