Enjoy the acoustic feast with your iPhone 6 / 6 Plus / 5 / 4 / 4S Adopting the advanced multiple sound hole style ergonomic in-ear design with deep bass, this magical earphone will take you to experience the incredible acoustic feast you have nerver heard before. Separated main and vice sound holes deliver true stereo music while the rear air hole and the bass hole offer great relax and resonant sound effect. The curved housing design let the sound fluidly flow into your ear canal with comfortable feelings. Main Features Ergonomic curved housing design fully matches the structure of the human ear with seamless sealing Innovative main and vice sound hole design provides high resolution of the tune. Rear air hole and bass hole make it more comfortable while offering best deep bass Enhanced cable materials make it more durable Built-in Mic allows your to freely make a hands-free phone calls Fully compatible for all the devices with 3.5mm jack.