The A4Tech HS-9 Stereo Headphone helps you to add balance and tone to your favorite tunes and clarity to your calls. Stunning Sound. Superior Comfort! Fully compatible with applications such as calls, Skype, Messenger and other conversations online. The omni-directional microphone offers clear communication. Rotatable design best for storage on the go in HS-9 headphones also the high-precision 40 mm unit deliver the accurate sound reproduction and hours of comfortable listening. Omnidirectional noise-cancelling microphone makes call clear and natural. The A4Tech HS-9 Stereo Headphone comes with a sensitive and tangle-free cable that provides durability also soft on-ear cushions that ensure comfortable wearing for hours use. The A4Tech HS-9 headphone comes with 1-year warranty.