car plug air humidifier purifier vehicular essential oil ultrasonic humidifier aroma mist car fragrance diffuser 4colors 50ml

aromatherapy function: pleasant smell helps you lift your mood, relieve tension and anxiety.2 hours power protection: after continuously working for 2 hours, it will cut off the power automatically. unique design: 360degree rotation, dual usb port, humidification can be charging simultaneously. note:it must be used when the car engine is started, and do not use it when there is no enough water in the bottle.water soluble essential oils are preferable. please do not use greasy aroma oils.