Maxell’s Sync Up True Wireless Earhooks are built for a secure fit. Their design ensures that your earbuds stay in for your workout, or sports event. They are equipped with noise isolating technology, and heavy bass, so you can focus on your goals while enjoying great audio quality. The durable and high-speed charging case protects and charges your earhooks, at the same time. Using the charging case, you can enjoy up to 15 hours of playtime!