BLUETOOTH 5.4 SLEEP HEADPHONES & SPORTS HEADBAND: MUSICOZY Bluetooth sleep headband combines the convenience of sleep headphones with the functionality of a headband; ideal for travel, sleep, workouts, running, yoga, and more; with wireless Bluetooth 5.4 technology, it easily pairs with smartphones and most Bluetooth-compatible devices, ensuring a seamless listening experience ADVANCED 5.4 VERSION BLUETOOTH SLEEP HEADPHONES: Enjoy superior stereo sound quality with MUSICOZY Bluetooth sleep headphones; powered by 40 mm composite drivers and featuring the latest Bluetooth 5.4 technology; adjustable speakers fit perfectly to your ears, offering true HD high fidelity sound; doubles as a Bluetooth sleep mask for a more restful sleep PERFECT FOR SPORTS & WORKOUTS: The MUSICOZY Bluetooth headband is waterproof, designed with a fully sealed casing inspired by submarine structures; perfect for intense workouts, runs, or yoga sessions without worry of sweat or rain damage; the removable Blu