1. Improve sleep life, support music calls 2. Bluetooth5.2 chip, support for connecting more devices 3. Using ice silk fabric, cotton filling inside, breathable and comfortable 4. Skin-friendly, 99% blackout rate, ultra-light and non-pressure 5. Elastic hook and loop fastener, suitable for more people to wear 6. Button control, simple and convenient 7. Built-in 150 mAh lithium battery, lasting life 8. Whether detachable and washable: Yes
