The JBL Tune 520BT headphones stream powerful JBL Pure Bass sound thanks to the latest 5.3 BT technology. Easy to use, these headphones provide up to 57 hours of pure pleasure and an extra 3 hours of battery with just 5 minutes of charge. Manage calls, sound and volume from the earcup, thanks to the convenient button control. Lightweight and comfortable even after hours of listening, the JBL Tune 520BT headphones fold flat in your backpack to follow you everywhere.