JBL pure bass sound: The JBL Tune 520BT feature the renowned JBL pure bass sound, the same that powers the most famous venues all around the world. | Wireless bluetooth 5.3 technology: Wirelessly stream high-quality sound from your smartphone without messy cords with the help of the latest bluetooth technology. | Customize your listening experience: Download the free JBL Headphones App to tailor the sound to your taste with the EQ. Voice prompts in your language guide you through the Tune 520BT features. | Up to 57H battery life and speed charge (5mins = 3H): For long-lasting fun, listen wirelessly for up to 57 hours and recharge the battery in as little as 2 hours with the convenient Type-C USB cable. A quick 5-minute recharge gives you 3 additional hours of music. | Hands-free calls with Voice Aware | Multi-point connections: Allows you to effortlessly switch from one bluetooth device to another. You can simply switch from a video on your tablet to a call on your mobile phone, so that you’ll never miss a call. | Lightweight, comfortable and foldable design: The lightweight materials and soft ear cushions with a padded headband make the headphones comfortable to wear for extended periods. The foldable design makes it convenient for you to carry your headphones anywhere and anytime you want music. | Ask Siri or Hey Google