Perfect workout headphones that are snug and secure so the headphones stay put while running, biking or at the gym. Built-in magnets let you attach the two headphones together when not using, and wear like a necklace around your neck, a convenient way to carry around when you don't need them. The rechargable long battery life means you get 9 hours of continuous music, or can relax with 80 hours of standby time when powered with a 5V external charger. cVc 6.0 Noise Cancelling Microphone reduces outside noises, enable clearer microphone sound. TT-BH07 Earbuds that work with the latest Bluetooth 5.0 technology; easy and fast pairing with smartphones, tablets and other Bluetooth enabled music devices; aptX codec provides pure, CD-like high quality sound for compatible devices.