Sony WF-C500 Truly Wireless.

* Sony WF-C500 Truly Wireless In-Ear Bluetooth Earbud Headphones with Mic and IPX4 water resistance, Black. *Up to 10hr battery life, total up to 20hr with charging case *Splash-proof and sweat-proof with an IPX4 rating. Supported Audio Format(s): SBC, AAC *Easier, clearer hands-free calling *Small and light for a great fit and all day wear *Ergonomic Surface Design conforms to most ear shapes *Fine-tune your sound using the Sony | Headphones Connect app *Optional use of one earbud only *Easy button operation to take control without your phone.