Aromatherapy size: 68 * 68 * 160mm Capacity: 3ml Power supply: DC 5V 1A Power: 3W Area: 25-30 square meters Material: PP+aluminum alloy+glass The air pump is used for compression, and the switch is gently touched. The compressed operation of the air pump diffuses the fragrance of vegetable oil to every corner. The fragrant space can relieve pressure and drive away tiredness and trouble for you. Low noise air pump is used to avoid disturbing your life. Built in lithium battery, USB charging, you can use it when you go out.