Product Material: flannel Size: 19.5 x 10.5 cm Control: four speeds constant temperature Heating temperature: 35-50 degrees Celsius [20 degrees Celsius at room temperature) Voltage: 5V Power : USB connector Color: purple, gray Quantity: 1 pc Package contents: 1 pc * steam mask for the eyes [battery not included)[Perfect touch and cover the delicate skin of the eyes]Flannel has a perfect touch, and on the back of the heated eye mask, it can cover the skin around the eyes perfectly and completely block the light so that you can sleep.[Comfortable sleep ] The moist warm compress and sweet lavender scents help you sleep more comfortably after long work, at home or long-distance filming.[Temperature and Time Control] It is designed with 3-class heating temperature from 35 to 50 and 3-class timing from 20 to 60 minutes. It stops automatically when the time is up.[USB port powered]This steam eye mask can be easily powered by PC, power, USB adapter. Can be taken anywhere.