[5V/2A USB-Powered Required & Portable] This eye mask have to be plugged in 5V/2A USB outlets for universal power supply, convenient to be powered by laptops, power banks, and car chargers. Kindly note that the mask is not cordless, have to use 5V/2A power supply to get enough heat. Compact and lightweight design allows you to take it to your office, airplane, traveling, etc. Just slip it into the included storage bag to carry and use anywhere and anytime. [3 Vibration Massage Modes] There are 3 adjustable vibration modes to choose from, including normal mode, leisure mode and vitality mode, meeting different needs for different situations. Kindly note that our vibration massage is gentle massage around the eyes, the strength of massage can't be comparable with professional massage eye mask. Vibration is inevitable to avoid making a little noise when the mask is worn on the face. [3 Temperature & Timer Settings] Featuring 3 heat levels (113?/131?/149?) and 3 timer settings for automatic shut-off from 30min, 45min, to 60min, this heated massage eye mask allows you to customize your own eye SPA for sleep satisfaction. Kindly note that do not the heating element in the heated eye mask is graphene, which cannot withstand excessive bending and pulling. Otherwise, the circuit is disconnected, which will cause the product to be damaged and do not heat. [3D Contoured Design] With the new 3D ergonomic design, the eye cup is deeper and wider, zero pressure on your eyes and you can blink freely and don’t have to worry that the eye mask will mess up your eye makeup while you are resting. Meanwhile, 3D design matches noses of any height, and it can block distracting lights to achieve a total darkness. [3 in 1 Multifunctional Eye Mask] This eye mask is combined with a sleep eye mask, a heated eye mask, and an eye massager, allowing you to use the heating and massage functions when you want to relief eyes tiredness, dry eyes and tensions, or you can just use it as a normal eye mask for more soundly sleep.