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The Mainstays Essential Oil Diffuser is a small ultrasonic cool-mist unit with a 100 mL reservoir. It runs on an included AC adapter, offers mist and light settings, and shuts off automatically when the water runs low. It suits a desk, nightstand or small shelf where you want light scent and a soft glow without a large footprint. Against larger ultrasonic diffusers it holds less water and covers less space, so it is a starter or single-room pick rather than a whole-floor one.
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Ratings average 4.1 out of 5 across 243 ratings, so most owners are satisfied with this small diffuser. Complaints tend to center on the small tank and modest mist output rather than on failure.
The Mainstays Essential Oil Diffuser is a compact ultrasonic diffuser. It uses cool-mist operation to disperse essential oils or fragrance oils from a 100 mL reservoir. The small freestanding shape sits on a tabletop, desk or shelf.
It has mist and light settings, so you can adjust the output and the glow. The unit shuts off automatically when the water runs low.
To set it up, remove the cover and inner lid. Fill the reservoir to the 100 mL max line and add 3-5 drops of oil. Replace the lid and cover, then connect the included AC wall adapter to the unit and to a wall outlet.
