This ticks every box. For a small area this does a very good job. We have open plan living and on high it definitely spreads the aroma around well. On low it will Maintain the fragrance that was already dispersed. The lights are very nice, remind me of a night light and can be used as a set Color or to automatically toggle through them all. It can also function with the light completely off. On high this unit lasts a few hours, I find half a day. On low it lasts all day and even into the night. It’s usually empty by early morning. It has an auto shut off when it is empty and if you overfill it, although on, it will not function. The oils that come with it smell amazing, last a while and are quite strong so you don’t need too many drops. Bare in mind they smell nothing like their name but none the less smell wonderful, especially tea tree and lavender.