Innovative housing design enables for easy adjustment and optimal wearing comfort with powerful 10mm drivers for sonic clarity, bass-driven stereo sound and good attenuation of ambient noise.Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your earsThe noise-cancelling microphone enables trouble free receiving of calls or undeterred sessions of musical extravaganzaPassive noise cancellation feature enables users to enjoy listening to music even in a chaotic and noisy environment; it also enables users to receive calls on-the-go