Onion shaped humidifier and diffuser a18 4.5w humidifier onion shape (capacity 160ml tank 15-20ml/h atomizer) bring the benefits of aromatherapy to your bedroom or travel experience with this innovative lighting humidifier. the flame simulation feature adds a touch of warmth, while the 7 colors allow for customizable ambiance. experience the calming effects of essential oils and soft lighting with this ultrasonic humidifier. whether you're at home or on the go, this usb powered device is a must-have for creating a tranquil environment. usb powered flame simulation ultrasonic humidifier with aromatherapy and lighting - essential oil diffuser for bedroom.