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. Its built-in microphone which enables you to make and answer calls hands-free while doing sports. It has Tangle-free cable length of 130cm and universal earphone jack is suitable for 3.5mm audio devices. You don't have to worry about running out of power, give you unlimited wired listening. for our esteemed customers we do suggest you adjust the sound volume to a proper level to perfect your eardrum because we do care for your health. its compatible to all Android phones . in addition wear correctly when you use the earphone, put earplug with 'L' in left ear, earplug 'R' in right ear.