A. This is a head-mounted wearable sleep device with unique features, specifically designed to improve sleep. B. It adopts an advanced design concept and is a portable smart sleep aid instrument, allowing you to use it conveniently in any scenario. Whether you are at home, taking a lunch break in the office, or on a journey, you can enjoy its sleep - aiding effects anytime and anywhere. C. This sleep device uses a rechargeable power - supply mode with a built - in battery, getting rid of the constraints of traditional power cords and making it more freely and conveniently to use. Its battery can last for 3 - 6 hours, which can meet your sleep needs for one night. Moreover, the capacity of its built - in battery is 50mAh or less, being small, light, and not imposing much burden on you. D. In terms of functions, it is equipped with a wireless remote - control function. You can easily adjust various parameters with just a gentle press, without any cumbersome operations. It also has a timing function. You can set the usage time according to your own needs, and the sleep device will automatically stop working after reaching the set time, providing you with a considerate using experience. E. The display mode is LED liquid - crystal display, which is clear and intuitive, enabling you to clearly understand various parameters and statuses at a glance. It can simulate white noise to help you block out external disturbances, creating a quiet and comfortable sleep environment, allowing you to fall asleep faster and enjoy a better sleep. Choosing this sleep device means choosing a quiet and comfortable sleep experience.