A bedroom that gets stuffy overnight, or a car that could use fresher air on a commute — the Ultrasonic Aroma Diffuser & Humidifier with LED is sized to handle both, in 300ml and 500ml versions. It pairs cool ultrasonic mist with a 7-color LED base, controlled from a remote instead of just the buttons on the unit.
Both sizes share the same CE-certified, BPA-free ABS/PP build, with mist output rated up to 300ml/h and rated coverage up to about 10㎡. Prices run from roughly $30.52 to $43.46 across the WYQS500, WYSS500, WYSS300, WYBS500, and WYBS300 finishes, each sold with EU or US plug options, and each currently listed below its compare-at price of up to $54.33.
A few drops of essential oil per 100ml of distilled water is enough to scent the mist, and the adjustable timer means it can be set to run for a fixed stretch rather than left on indefinitely. Operation stays under 36dB, quiet enough for a bedroom or a small office.
The 300ml size is a reasonable match for a desk, car interior, or smaller bedroom, while the 500ml option is worth the extra size for a primary bedroom or a space that needs to run mist through a full night without a refill. Either way, the shared remote control and 7-color LED come standard across both sizes.
Auto shut-off is built in to help the unit power down once the tank runs low, and weekly cleaning is enough to keep mist output consistent — a low-maintenance addition to a nightstand, desk, or car console. Because the LED, mist mode, and timer are all reachable from one remote, it also tends to suit anyone who'd rather adjust settings from bed than get up and press buttons on the base itself.
Top off the tank with a pick from our essential oil collection for a scented mist.