... use, ideal for promotion, with LED indicator. Description for Ultrasonic humidifier : 1.Humidifying the air by vaporizing water with cool ultrasonic waves.2.Variable vapor ... , aromatherapy salon, office, coffee house...5.Five in one functions: Aroma Diffuser, Mini Humidifier, Air Purifier, Small Night Light, Sterilize.6.Removable ...