[Convenient Visible Eye Mask] The hot eye mask cover can be removed, helping you take care of your eyes without blocking your vision, so you can do other work and don't need to take tine to care for your eyes. It is definitely recommended for those who dont have much time or who want to use their time efficiently. Besides, it has a good fit and comfort, so it is a good companion before going to bed even for those who have trouble sleeping. [Economical USB Charging] The cordless eye mask is USB charging, which can be charged from a laptop, mobile battery, USB charger, car power supply, etc. A full charge only takes just 75 minutes. One charge can last up to 60 minutes. The efficiency of charging and power supply has also been improved compared to ordinary USB rechargeable eye masks [Cordless, Non-binding, 3D structure] The elastic band and belt make it easy to match with various head sizes regardless of gender or age. The 3D design fits gently around the nose, cordless and pressureless, making it very comfortable to wear. The part that touches the eyes is made of PU leather material, which is soft, breathable, and gentle on the skin. [Cold and Hot] The new heating technology is adopted, with high thermal conductivity, which can not only heat up quickly, but also keep the temperature uniform. By pressing the heating power buttonthe heating mode can be adjusted in 3 stages, 48C, 42C, and 38C. In addition, it comes with cooling gel, which has a cold compress effect, so it can be used not only for sleep, but also for bags under the eyes and eyestrain.