This little diffuser will work to humidify the air for a good six to eight hours. They’re also equipped with timed auto shut-off modes. Amp up your relaxation by adding your own favorite essential oils (our go-to scent is lavender, gotta get that R&R!). Mist Mode 6–8 hours running time until water runs out 60, 90, 180 minutes auto shut-off or 30 sec toggle mode to last even longer. We’ve upgraded the diffusers from a 5v to a 12v motor, so they can diffuse more and cover a larger area.