About this item 1-DSEE restores high frequency sounds lost in compression.Specific uses for product : Sports and Exercise 2-Up to 10 hr battery life, total up to 20 hr with charging case 3-Splash-proof and sweat-proof with an IPX4 rating. Supported Audio Format(s): SBC, AAC 4-Easier, clearer hands-free calling 5-Small and light for a great fit and all day wear 6-Ergonomic Surface Design conforms to most ear shapes 7-Fine-tune your sound using the Sony | Headphones Connect app 8-Optional use of one earbud only 9-Easy button operation to take control without your phone.