Enjoy high sound quality all day long. The WH-CH520 headphones with up to 50 hours of battery life, stable connectivity, and enhanced call performance, meet the demands of your day.. Features. INTRODUCING THE SONY WH-CH520: Enjoy superb sound for every song, in a style that suits you; Featuring our Digital Sound Enhancement Engine (DSEE), and so much more. HIGH-QUALITY SOUND, TAILORED TO YOU: These Sony headphones feature DSEE technology to upscale every track, 360 Reality Audio, and a customisable 5 band EQ in the Sony; Sound Connect app. LISTEN IN COMFORT, AND STYLE: With soft earpads and weighing just 147g, these wireless headphones are comfortable; Choose Black, White, Blue, Beige, Pink, or Yellow to match your look. LONG BATTERY LIFE: Delivering up to 50 hours of battery life, you get power for days with these Bluetooth headphones; A quick 3-minute charge provides up to 90 minutes of playback. CLEAR CALLS, AUTOMATIC CONNECTION: The Sony WH-CH520 headphones capture your voice clearly; Multipoint Connection pairs two Bluetooth devices at once and seamlessly switches between them. QUICK, EASY CONTROL: Use buttons on the earcups or the Sony; Sound Connect app to control the WH-CH520 headphones; Swift Pair and Fast Pair make connecting to your devices simple