Multifunctional Bluetooth Sports HeadbandThis 4-in-1 designed Bluetooth sports headband allows you to enjoy music without additional headphones while avoiding the interference of messy hair and sweat. Using ultra-thin flat speakers, it is extremely comfortable to wear when lying on your side or sleeping, and can also be used as an eye mask to block dazzling light. The material is soft and breathable, absorbs sweat and dries quickly, making it especially suitable for wearing during exercise. The speakers are removable for easy cleaning of the headband. Designed specifically for side sleepers, the control module is located between the speakers to avoid pressure on the ears and effectively isolate environmental noise without the need to wear uncomfortable earplugs. It has a built-in rechargeable lithium battery, which can last for 8 hours after 2 hours of charging. Bluetooth 5.0 technology ensures stable connection with mobile phones, tablets, laptops and other devices.