The music playback time is up to 60 hours, with up to 4 hours on the earbuds themselves, and even longer when using the charging case. Each earbud weighs a mere 3.8g and fits snugly in the ear for comfort. You can use them with confidence while on the move, without worrying about them falling out. They also have waterproof performance, making them ideal for sports and exercise. However, please note that the charging case is not waterproof. The charging case has an automatic pairing function, allowing you to connect via Bluetooth simply by taking out the earbuds. Furthermore, they use Bluetooth 5.3+EDR, which excels in audio relay, and you won't experience sound skipping or interruptions. They also feature noise-canceling technology, allowing you to enjoy your music with focus. This product can be used with peace of mind.