The sound is very low and does not affect your sleep and work. It is perfect for small babies. The water will automatically stop when it is used up.It is not recommended to use it with essential oils as it will damage the machine and cause leakage problems. This product uses 2 kinds of atomization, which is convenient to choose and is a handy tool. The humidifier spray is not easy to wet the desk, appearance in tree shape, simple shape, mini portable. specification Project type: Humidifier Blue color Material: ABS Package list: 1 x humidifier