Stunning sound and longer battery lifeEnjoy 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.Listen longer with up to 50-hour battery lifeKeep your music playing all day with a battery life that delivers up to 50 hours of power.1 USB Type-C quick charging gives up to 90 mins of play back from 3 minutes of charge. Now you’ll have enough power for multi-day road trips and long festival weekends.Enjoy all day comfortWith an adjustable headband, soft earpads and lightweight design, you can find your perfect fit and stay comfortable for longer.Multipoint connectionFor total convenience, these Bluetooth® headphones can be paired with two Bluetooth® devices at the same time. So when a call comes in, your headphones know which device is ringing and connects to the right one automatically.Keep control with easy-to-use buttonsAn easy-to-use selection of buttons help control your headphones, meaning you can play, stop, or skip through your tracks and adjust the volume, all with a tap of your finger.Voice controlJust say “OK Google” or “Hey Siri” to activate your preferred voice assistant.4 Enjoy entertainment, connect with friends, get information, listen to music and notifications, set reminders, and more.Listen to and interact with emails in Microsoft Outlook and join Microsoft Teams meetings using Google Assistant or Siri.Easy hands-free callingConversation flows freely with easy hands-free calling, thanks to the built-in microphone.2 No need to even take your phone from your pocket.Your sound, just how you like itTailor sound to your personal preference by choosing from a variety of pre-sets to match sound quality with the genre of music you're listening to. Or create and save your own pre-sets using the EQ Custom feature on the Sony│Headphones Connect app.Make your music more naturalWhen an original music source is compressed, it loses the high-frequency elements that add detail and richness to a track. Our Digital Sound Enhancement Engine (DSEE) faithfully restores these to produce high-quality sound that’s closer to the original recording.Select the color that suits your styleWith a choice of black, blue, white or beige – you can choose whichever suits you best and enjoy comfortable texture and quality.Take your music wherever you goThe compact, lightweight design and swivel earcups make the headphones the perfect companion for all of your travels.Aiming to achieve a zero environmental footprintInspired by the beauty of the world, Sony is doing its part to help preserve the Earth, while still allowing creators to produce even more beautiful and creative imagery. With a goal of achieving a zero environmental footprint across the entire Sony Group by the year 2050, we are accelerating numerous green initiatives.Sustainability in mindThe WH-CH520 headphones are designed for both comfort and environmental consciousness. The headphones use recycled plastic materials, and the packaging uses no plastic.