Does this product come with a warranty?

Yes, we do have a warrantly for this product. If you have any question when using this product,please feel free to email us via with your order number. We promise you a quick response and a nice solution.

Does this diffuser act as a humidifier?

Yes this essential oil diffuser can work as a humidifier to humidifying the room, it can also
1) work as a diffuser to diffusing fragrance by 2-3 drops of different flavors essential oils.
2) work as air purifier to purifier air and resist from flu or cold or dust. Cover the pet smell or smoking smell.
3) work as night light, 7 colors for children, improve sleep quality.

Which type of water is best to use for hydrogen-rich water sprayer?

Use mineral water only. Do not add oil or non-water soluble substances into the water tank.