Lightweight with an ergonomic design, the WF-C510 earbuds pair comfort with up to 22 hours' battery life in both the earbuds and the charging case for an easy, all-day listening experience. They can pair with two Bluetooth®-enabled devices simultaneously, automatically switching between them when you get a call. A compact, lightweight pair of earbuds with up to 11 hours of battery life in the buds and another 11 hours of charge in the charging case. And with 5-minute quick charging, you can top up in a hurry for an extra hour. Also includes Digital Sound Engine Enhancement (DSEETM) and Multipoint Connection for simultaneously playback from two Bluetooth® devices.The WF-C510 earbuds are optimised to perfectly match the human ear. Combining the ear shape data we've been collecting since our first in-ear earbuds were introduced in 1982 with an analysis of various types of ears, we've developed an ideal shape that's comfortable for all. Multipoint Connection allows the WF-C510 earbuds to be paired with two Bluetooth® devices simultaneously. So, if you're listening to music on one device, and a call comes in on another, your music is automatically paused and the call is switched from the other device. Your music then automatically resumes once the call is complete. Ambient Sound Mode keeps you aware of your surroundings. It captures and filters ambient sound when activated. The WF-C510 earbuds also include Voice Focus, which allows you to hear human voices while suppressing noise.The buttons on the WF-C510 earbuds not only let you play, stop, skip through tracks and adjust the volume - they also offer an easy way to access your smartphone's voice assistant and receive calls hands-free. With 'Quick Access' you can easily operate Spotify Tap allowing you to get your tunes playing in just a few simple taps - no need to touch your smartphone. You can simply enjoy your music in an effortless way. Conversation flows freely with easy hands-free calling, now clearer than ever with a high-quality built-in microphone. You won't even have to take your phone out of your pocket.With an IPX4 water resistance rating, splashes and sweat won't stop these headphones - so you can keep on moving to the music. Our products are not only designed to be stylish but also with the environment in mind. Recycled plastic is used in the WF-C510 earbuds, and no plastic is included in the individual packaging. These reflect Sony's commitment to reducing the environmental impact of our products and practices.True wirelessBluetooth multipoint for switching between devicesPassive noise-isolatingQuick charging - 1.5 HoursBattery life: Up to 11 hours (22 hours with case)Water & sweat resistant (IPX4)Manufacturer's guarantee - 1 YearBox contents - Sony WF-C510 Wireless Bluetooth Earbuds, Charging case, Hybrid silicone rubber earbuds, Reference guide, Warranty card