Large Capacity Water Diffuser: This aromatherapy diffuser comes with a 400ml water tank and can run for up to 10 hours. It is easy to clean. Be careful not to exceed the maximum water level. Cool Mist and Mute: Ultrasonic technology provides a fine and stable cool mist to keep the room clean and provide sufficient humidity. Calming atmosphere below 35 decibels for a peaceful sleeping environment. BPA FREE & WATERPROOF CLOSURE SYSTEM: This diffuser uses BPA free high-grade plastic, which will not emit harmful and plastic smells, allowing you to enjoy a pleasant and healthy life. In addition, the air humidifier will automatically shut off when the water runs out. Don't worry about damaging your device or endangering your users. Simple and Practical Design: It is an air particle humidifier, aroma diffuser/air purifier. Small and portable design, graceful shape and unique style. Especially suitable for people who like high quality and love life. Uses: Can be used as aromatherapy machine, air humidifier, air purifier, night light. The perfect gift for family and friends on holidays, birthdays and anniversaries. It adapts naturally to different rooms. Such as at home, bedroom, office , spa, hotel, baby room, etc.