Blue. Small size, great sound. These ultra-compact wireless earbuds feature high-quality _x000D_ sound, long battery-life and a go-anywhere design. _x000D_ Thanks to their simple operation, compact charging case and easy to use companion _x000D_ app, the WF-C510 is a great way to start enjoying the freedom and convenience of _x000D_ truly wireless earbuds._x000D_ • Truly Wireless earbuds with compact charging case_x000D_ • IPX4* water/sweat-resistant, for go-anywhere everyday use_x000D_ • Multipoint- connect with 2 devices simultaneously_x000D_ • Ambient Sound Mode- remain aware of your surroundings_x000D_ • Up to 11 hours music per charge, 22 hours with the charging case_x000D_ • Stereo hands-free voice calls and reliable Bluetooth connectivity_x000D_ • Sony | Headphones Connect app; custom EQ, ASM settings and more_x000D_ • Quick-charge; 5 minutes charge gives approx. 60 minutes of music playback