Small size; great sound. These ultra-compact wireless earbuds feature high-quality sound; long battery-life and a go-anywhere design. Thanks to their simple operation; compact charging case and easy to use companion app; the WF-C510 is a great way to start enjoying the freedom and convenience of truly wireless earbuds. - Truly Wireless earbuds with compact charging case - IPX4 water/sweat-resistant; for go-anywhere everyday use - Multipoint-connect with 2 devices simultaneously - Ambient Sound Mode-remain aware of your surroundings - Up to 11 hours music per charge; 22 hours with the charging case - Stereo hands-free voice calls and reliable Bluetooth connectivity - Sony | SoundConnect app; custom EQ; ASM settings and more - Quick-charge; 5 minutes charge gives approx. 60 minutes of music playback What's in the Box: - Charging-Case; 3 sizes of earbud tips (SS; M; LL) - Reference guide - USB-C charging cable is not included