About this item PREMIUM SOUND QUALITY - Includes 3 pairs of stereo earphones with microphone, surround sound effect with good bass, clear and vivid, allowing you to have a better listening experience. ERGONOMIC DESIGN - Provides a comfortable fit for your ears, ideal for long-time wearing. Flexible and lightweight, snug and secure, they can be easily threaded through a jacket, bag, or backpack. COMPATIBILITY - Ideal for iOS devices, Android smartphones, Windows phones, MP3/MP4 players, music speakers, and all other 3.5mm jack devices. MULTI-FUNCTION - Built with a multi-functional button in line, making the earphones more convenient to Play / Pause / Answer / End Calls / Next Track / Previous Track. The built-in microphone is convenient for hands-free calling, allowing you to Answer, Reject, and End calls directly with the earphones. NOISE ISOLATION - The earphones provide a noise-isolating environment, suitable for working, running, jogging, etc., and come with an extra 6 pairs of dif