1. Flat head design. 2. Built-in microphone, support handsfree call function. 3. Good music, clear talk sound. 4. Ideal for most smartphones (such as: iPhone, Samsung, HTC, Sony, LG, Nokia, Xiaomi, huawei, Lenovo, Motorola, MEIZU, BlackBerry, MIUI, etc), tablet, PC Computer, game machine, and other audio devices that with 3.5mm earphone plug. 5. Exquisite craftsmanship and fashion appearance.