Welcome to our shop Product Material: Flannel Size: 19.5*10.5cm Control: Four-speed constant temperature Heating temperature: 35-50 degrees Celsius (normal temperature 20 degrees Celsius) Voltage: 5V Power supply: USB plug-in Color: Color Quantity: 1 Piece Package Contents: 1pc* Steam Eye Mask (battery not included) 1. Versatility: This mask is ideal for relaxation, stress relief, headache relief, and can also be used as a simple sleeping mask. It offers an optional pleasing scent with an insert pad and can provide low levels of moisture for enhanced aromatherapy. 2. Comfort: Easily adjustable with elastic straps, the mask is comfortable to wear and fits different face shapes without creating pressure points. 3. Customizable: Individually adjustable with four heat levels and four time intervals ranging from 35 to 50 degrees Celsius. It automatically shuts down when the time is up. 4. Flexible Use: The eye mask can be used on the go with a USB adapter on a PC/Laptop, power bank, car, or other USB connection. The included carrying case makes it easy to carry, and it is more economical than single-use disposable evaporative eye masks. 5. Soft and Safe: The inside of the eye mask is made of soft and fluffy material, offering a gentle touch to the eyes. Extensively tested during development, it is designed to avoid the possibility of damage from overheating, unlike traditional microwave goggles. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.