Product description Size: 19.5 x 10.5 cm Control: constant temperature with four speeds Heating temperature: 35-50 degrees Celsius ( 20 degrees Celsius at room temperature) Voltage: 5V Power supply: USB plug-in Colour: gray Quantity: 1 Piece Package contents: 1 piece * Steam eye mask (battery not included) Perfect touch and coverage of the sensitive skin of the eyes Flannel has a perfect feel, and on the back of the Heated eye mask can perfectly cover the skin around your eyes and completely block the light to help you sleep. Comfortable sleepThe moisture-warm compress and sweet lavender scents help you at home after long work or sleep more comfortably on long-distance movies. Temperature and time controlIt is designed with 3-class heat temperature from 35C to 50C and 3-class timing from 20 to 60 minutes. It will stop automatically when the time is up. Powered by USB portThis steam eye mask can be easily powered by PC, power bank, USB adapter. Can be taken anywhere.