Open-ear clip-on design provides a breathable, secure fit while keeping you aware True wireless design with Bluetooth and RF technology ensures seamless connectivity 12mm x 17mm titanium-coated racetrack drivers deliver rich, powerful sound with 3D surround Dual noise-reduction mics deliver crystal-clear calling experience both indoors and outdoors Durable hard-shell design with a broad contact area keeps earbuds stable during vigorous movement IPX4 water resistance makes these headphones reliable for use in various environments Each earbud weighs only 5.7g, minimizing fatigue and ensuring lasting comfort Enjoy up to 10 hours of playback per charge, extended to 30 hours with the charging case Fast charging provides three hours of use in just 10 minutes