Concerning this item The Tune 510BT wireless headphones have the well-known JBL Pure Bass sound, which is present in the world's most renowned venues. To ensure you don't miss a call, you can stream wirelessly from your device and even switch between two devices with Wireless Bluetooth 5.0 Streaming. Listen wirelessly for up to 40 hours and use the handy Type-C USB cable to recharge the battery in as little as two hours for continuous enjoyment. You can listen to music for two more hours after a quick five-minute recharge. With the handy buttons on the ear-cup, you can effortlessly manage your calls and adjust the sound on your headphones. Siri or Hey Google is only a button away: press to turn on your device's voice assistant.