• DSEE™ restores high frequency sounds lost in compression for richer audio. • Up to 10 hours of battery life on a single charge, with a total of up to 20 hours using the charging case. • IPX4 rating provides splash-proof and sweat-proof protection for workouts and outdoor use. • Ergonomic Surface Design conforms to most ear shapes for a secure and comfortable fit. • Fine-tune your sound using the Sony | Headphones Connect app for personalized audio. • Can be used with one earbud only for flexibility and awareness of surroundings. • Easy button operation allows control of music and calls without needing your phone. • Experience 360 Reality Audio for immersive listening (service subscription may be required).