Features: Lightweight in-ear headphone provides natural clear sound and super enhanced bass. Noise isolating in-ear design blocks ambient noise to help you focus on listening pleasure. Tangle-free cable with 3.5mm universal earphone jack is suitable for 3.5mm audio devices. Built-in microphone enables you to make and answer calls hands-free while doing sports. You don't have to worry about running out of power, give you unlimited wired listening.