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The BCOOSS Cool Mist Humidifier is a small USB-powered ultrasonic unit with a 300ml tank, a built-in essential oil diffuser and a color-changing night light. It runs in continuous or intermittent mist modes and shuts off automatically when the water runs out. Its tank is tiny next to room humidifiers, so it suits a desk, nightstand or small bedroom rather than a whole room. Owners rate it poorly overall; the common complaints center on mist output, leaks and short run time.
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Lowest price we've seen: $10.99 on Nov 12 at Walmart. Tracked across 1 store since Nov 12.
With 46 ratings averaging 2.8 out of 5, owners are split at best. Many like the compact size, quiet mist and night light, but a large share report weak output, leaks or units that quit working.
This is a portable ultrasonic cool mist humidifier with a 300 ml capacity. It is powered through a USB cable and helps ease dry air in a room. It runs quietly and shuts off automatically.
A single button controls it. One click starts continuous spray, a second click switches to intermittent spray, and a third click stops it. Holding the button for 3 seconds turns on the white night light. Holding it again for 3 seconds switches to the colorful night light, and a third 3-second hold turns the light off.
Use clean tap water or mineral water. Avoid distilled water.













