Enjoy deep, punchy EXTRA BASS sound in a truly wireless headphone. Enjoy up to 18 hours of listening thanks to the handy charging case. And if you’re in a hurry, 10 minutes’ quick charging gives you up to 60 minutes of music playback. The Ergonomic Tri-hold structure provides a secure fit, and the IPX4 design gives you long-lasting sound through rain and sweat. With four sizes of hybrid silicone rubber earbuds included you can find the perfect fit for your ears to maximize sound quality and minimize outside noise. Color: Black.