Pebble Flex Air comes with an innovative magnet design, you can wear it around your neck like a necklace, which decreases the burden on ears and keeps them from dangling freely when not in your ears. Advanced 10mm dynamic drive units bring you unparalleled music experience with high bass. The latest Bluetooth 5.0 technology ensures you faster and more stable signal connection and transmission, capable of quicker pairing with any Bluetooth-enabled device. With a powerful rechargeable battery that lasts up to 10 hours after fully charged for about 1.5hours. You can enjoy your wireless sport and music time all day long without worrying about having to plug your headphones back in to charge.