400ML AROMA DIFFUSER ULTRASONIC with 400 ml water capacity, this aroma diffuser ensures long-term fog generation. The ultrasonic vibration turns the water and oil into a fine mist and refreshes the room. When the water in the ultrasonic humidifier is used up, the device switches off automatically. VERY QUIET WITH ULTRASONIC TECHNOLOGY Based on ultrasound technology, this ultrasound fragrance lamp is very quiet (less than 30 dB) when in operation. It produces ultra-fine mist, ensures a pleasant room climate. This allows you to breathe better while sleeping. BPA-FREE MATERIALThis aroma nebulizer ultrasound is made of BPA-free material. It helps to replace air and remove bad odors. And it helps you breathe easier, etc. And it's safer than candles and incense. 4 TIMER SETTINGS AND 7 LED COLORS Four time settings: 1 hour / 3 hours / 6 hours / continuously. With 7 colors, this led humidifier is also a night light. Perfect for children's room, yoga, study, apartment, bedroom, hotel, hospital, toilet, office or any other private / public circumstance.