Experience up to 25 hours of battery life with these Bluetooth headphones. The in-ear headphones deliver a more authentic music experience, courtesy of our Digital Sound Enhancement Engine. Customize your audio with the equalizer feature available on the Sony | Headphones Connect app. These Sony headphones are designed to withstand splashes and sweat with their IPX4 water-resistant rating. Effortlessly make hands-free calls and access your voice assistant. Included components: Reference guide.