D21 oblique in-ear flat-head wire control with microphone listening to music headphones are perfectly compatible with various devices such as Huawei, Apple, and Android. Featuring a classic round hole design, they are lightweight and comfortable, not easy to fall off, and remain comfortable even after long periods of wear. High-definition sound quality makes every note clear and moving. The built-in wire control microphone allows for easy answering of calls and voice assistant interaction, freeing your hands. Combining exquisite craftsmanship with a stylish appearance, the D21 headphones are an ideal choice for music lovers, allowing you to enjoy high-quality sound anytime, anywhere and enhance your life's enjoyment.