Cover bluetooth headphones, ultra-small mini design, perfect fit to the ear, comfortable to wear, designed for use while sleeping. Adopt in-ear design, effectively isolate noise, bring more immersive music experience. Equipped with the latest Bluetooth 5.4 technology, stable connection, clear sound quality, providing a smoother wireless experience. Sliding cover design, convenient storage, protect the headphones from dust and damage, easy to carry at any time. Lightweight and invisible design, will not interfere with sleep or exercise, suitable for use in any occasion.