550ml Cool Mist Oil Diffuser
550ml Cool Mist Oil Diffuser
Free US shipping over $55 · $8 flat below. Most orders arrive in 1–3 weeks. Shipping policy
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Description
Description
A still, dry bedroom is a hard place to wind down in. This ultrasonic diffuser breaks water and essential oil into a whisper quiet, ultra fine cool mist that keeps the air feeling comfortable without the draught or hum of a fan. Set it going an hour before bed and the scent has time to settle through the room while you slow down, rather than arriving all at once when you are already trying to sleep.
The 550ml tank is the useful part. It holds enough water for a long, uninterrupted run, so you are not refilling partway through the evening or waking to a machine that stopped hours ago. As an ultrasonic unit it produces cool mist rather than steam, with no heating element involved, and it shuts off on its own once the water is gone so nothing is left running dry overnight.
A 7-color LED glows through the body so you can hold it on a warm amber for a calm bedside light, pick a cooler shade for a hallway, or let the colors cycle gently. Fill with clean water and a few drops of pure oil, rinse the tank regularly to keep output fresh and clean, and place the diffuser on a stable surface out of reach of children and pets, storing oil bottles closed and safely away.
- 550ml tank for long, uninterrupted running time
- Ultra fine cool mist with no heating element
- Whisper quiet ultrasonic operation for bedrooms
- 7-color LED that holds on one shade or cycles
- Automatic shut off when the tank runs empty
- Place out of reach of children and pets, store oils closed
Shipping and Returns
Shipping and Returns
Free US shipping on orders over $55. Orders under $55 ship for a flat $8. We ship within the United States only.
Most orders arrive within 1 to 3 weeks, including 1 to 2 business days of processing. You will receive tracking by email once your order ships. Orders with several items may arrive in more than one parcel.
30 day returns. Items under $35 do not need to be sent back โ email us and we will refund you. For items $35 and over, email us first and we will send the correct return address.

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Free US Shipping Over $55
Flat $8 on orders under $55
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Dedicated Support Team
We care about your experience with us
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Easy 30 Day Returns
Quick and easy returns with no hassle
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Quiet Enough To Sleep Through
A still, dry bedroom is a hard place to wind down in. This ultrasonic diffuser works at a whisper, so it disappears into the background rather than keeping you awake.
Cool Mist Without A Draught
It breaks water and essential oil into an ultra fine cool mist that keeps the air feeling comfortable, with none of the draught or hum of a fan.
550ml Runs Through The Night
The tank is sized to last a full night rather than cutting out at two in the morning. The9thHour checks run time before anything joins the range.
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Durable Materials
Long lasting and durable materials
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Timeless Designs
Every product is always time tested
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Easy Setup Everytime
Hassle free setup and accurate sizing
Frequently Asked Questions
How quiet is it really?
Ultrasonic diffusers work by vibration rather than a fan, so there is no motor noise. Most people stop hearing it within a minute of lying down.
How long does a tank last?
The 550ml capacity is sized to run through a full night on a normal setting, and considerably longer on the lower intermittent modes.
Does it double as a humidifier?
It adds noticeable moisture to a dry room, which is one of the main reasons people run one overnight in winter alongside the scent.
How much oil should I add?
A few drops into a full tank is enough. Ultrasonic mist carries scent efficiently, so more oil rarely means a better result.
How do I clean it?
Empty it and wipe the tank every week or so. Rinsing out the old oil keeps the mist output strong and stops scents mixing.