Bluetooth 5.3 and easy pairing Equipped with the latest Bluetooth 5.3 technology for faster transmission and wider range. DSPenabled antijamming provides a stable, speed wireless music experience. When you open the charging case, the kids earbuds automatically connect to the last paired device. HiFi stereo sound and clear calls 13 mm largediameter drivers deliver clear midrange with balanced bass and treble. CVC8.0 noise cancellation and dual HD microphones ensure quiet music and clear calls, even in noisy environments. IPX5 waterproof and universal compatibility IPX5 protection resists daily water splashes, sweat, and rain. Compatible with iPhone, iPod Shuffle, iPod Nano, Android devices, Samsung, BlackBerry, HTC, iPad Pro, and other Bluetoothenabled smartphones and tablets. 25 hours of battery life and fast charging Earbuds provide up to 4 hours of listening on a single charge; the charging case extends total usage to 25 hours. TypeC fast charging delivers about 90 minutes of listening from a 10minute charge. Use scenarios Sports and workouts: ideal for running, jogging, gym, and general exercise. Travel and daily activities: suitable for commuting, studying, and listening to audiobooks. Home entertainment and sleep: watching TV, relaxing, and private listening with clear call quality when needed.