My YouTube video above for the Ultrasonic Oittm WiFi enabled Cool Mist Humidifier
The Oittm Ultrasonic Humidifier's 3l capacity will allow you to run the WiFi Smart humidifier for an extended period of time. (expect between 15-25 hours of continuous use) Its fascinating to watch how the ultrasonic system works in producing water vapour.
Oittm have included a nice low water feature, you will be notified by a message on your smart device that your product needs to be refilled.
This device works on Amazon Alexa, Google Assistant and also on your smartphone via the app. One thing I really liked is if you have more than one Oittm product, it will appear in the app and you can control all of them from it.