Sound Quality – DSEE restores high frequency sounds lost in compression Battery Life – Up to 10hr battery life, total up to 20hr with charging case Ratings – Splash-proof and sweat-proof with an IPX4 rating Built-In Mic – Easier, clearer hands-free calling Comfort – Small and light for a great fit and all day wear Design ? Ergonomic Surface Design for Secure fit Portable – Go anywhere with pocket-sized case Easy button operation – WF-C500 Earbuds not only let you play, stop or skip through tracks and adjust the volume Colours Available: Orange, Green, White & Black