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. 20 Hz to 20 kHz is the dynamic frequency response range (Hz). 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 earcup, you can effortlessly manage your calls and adjust the sound on your headphones. Note: Please disable Bluetooth if you experience any problems connecting.