The JBL Tune 520BT headphones deliver powerful JBL Pure Bass sound along with Bluetooth 5.3 technology. They offer up to 57 hours of pure music enjoyment, and thanks to fast charging, they provide up to 3 additional hours of battery life after just 5 minutes of charging. Download the free JBL Headphones app to customize your sound with the equalizer. You can also enable voice prompts in the app to guide you through the headset's features. With convenient control buttons, you can manage your calls, audio, and volume directly on the headphones. Voice Aware allows you to adjust how much of your own voice you hear during calls. With the press of a button, you can activate your device's voice assistant. The lightweight design and soft ear cushions ensure comfort even during hours of listening. Plus, thanks to their foldable design, you can easily fold them flat for storage, such as in a backpack. They will accompany you wherever you go.