Fashion Knurling Design: Metal knurled design, specially & textured Nature & Fidelity sound: Close sound chamber is created with a strong outstanding low frequency, voice is natural and fidelity Wear Steadily and comfortably: The oblique In-Ear style of wearing is comfortable, so that it clings to your ear without drop Single key operation: Single key operation, support listening to music and calling Function:For Mobile Phone,Sport,Common Headphone,for Video Game,HiFi Headphone,For iPod