Bluetooth 5.3 The earbuds utilize Bluetooth 5.3 technology, providing a stable and efficient wireless connection to your device. Customized Sound The Soundcore app allows you to customize the sound profile of the earbuds according to your preferences. You can adjust the equalizer settings, create personalized sound profiles, and tailor the audio experience to your liking. 28-Hour Long Playtime The earbuds come with a long-lasting battery that provides up to 28 hours of playtime. This means you can enjoy your music or podcasts throughout the day without worrying about frequent recharging.