LIWUYOU Vase Shaped Mini Portable USB Air Freshener Humidifier for Home Office Color Blue Protable Mini Air Humidifier for car,office,home,travel Only need water and adapter power supply,say goodbye to dry life and reduce radiation caused by computer Ultra-quiet,Low-power design ,suitable for children,old-people,women and others You can freely mix with essential oils and flowers, in the wetting air at the same time , volatilize pleasant fragrance. 2 hours to automatic power off function, safety to use