Immersive, full-range audio: custom-tuned dual driver technology provides deeper bass and higher frequency detail for dynamic, superior Audio clarity on-the-go Secure in-ear fit & passive noise isolation: comes with 3 sizes of silicone tip replacements for achieving the best fit To improve comfort and outside noise reduction Convenient in-line mic controls: includes a built-in microphone and mute switch for in-game chat Plug & play 3.5mm headphone jack: compatible with most laptops and mobile smart phones Lightweight & durable construction: braided cables and an aluminum frame allows the Hammerhead duo earphones to survive the rigors of most daily use-cases