The RELX Hot Eye Mask is a high-performance eye mask that can be used repeatedly to provide a comfortable sleeping experience. It is ideal for daily sleep, as well as for desk work, breaks while studying, and naps. 【3 Levels of Temperature Adjustment】Easy operation with one button. It can be adjusted in three levels: 48°C (high), 44°C (medium) and 35°C (cold). Made of graphene material with excellent thermal conductivity and heat retention, you can feel a pleasant warmth in about 3 seconds after turning it on. For the ultimate relaxation time that can be unraveled. [100% high-quality silk] The body cover that touches sensitive eyes is made of 100% high-quality silk from 22 pieces. It is excellent in texture, durability, breathability, and light blocking, and gently wraps around the eyes. 【Hand washable to keep clean】The silk cover can be washed by hand. Even if you use it repeatedly, you can keep it hygienic and clean. [Ultra-lightweight] The main body is only about 65g. It is light to wear and provides a comfortable feeling that does not interfere with sleep. 【Automatic power off in 30 minutes】Safe design to prevent overuse. It automatically turns off in 30 minutes, so you don't have to worry if you fall asleep. It also prevents overheating and low-temperature burns. [Commitment to a good night's sleep] Easy adjustment with adjuster, soft elastic band that prevents ear pain for a comfortable fit. The cordless and silent design makes it easy to use anywhere. It comes with a special case, so you can easily carry it around on an airplane or train while traveling or on a business trip. [How to use] (1) Press and hold the power button for about 3 seconds. (2) Press the power button briefly to switch to your preferred temperature setting. (3) The power will automatically turn off after 30 minutes. *It is also possible to turn off the power manually. Charging time: about 2 hours (when using a DC 5V2A AC adapter). *An AC adapter is not included, so please use your AC adapter or USB port. *When charging for the first time or if you have not used it for a long time, the charging time and usage time may differ significantly from the guideline, but it usually returns to normal after several recharging and use. 【Contents】Main unit, cover, USB charging cord, storage case, Japanese instruction manual (with warranty card) *This product does not come with an AC adapter. *Output value: Please use DC5V2A equivalent. *Output value: If you use a device with more than 5V2A DC and it breaks down, it will not be covered by the warranty even within the warranty period. *Please be sure to use the included charging cable when charging. It cannot be used while charging.