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