420ml USB Cool Mist Humidifier & Aroma Diffuser Night Light

Stay Comfortable Anywhere with Soothing Cool Mist

The 420ml USB Cool Mist Humidifier is your compact, plug-and-play solution for adding gentle moisture to any space. Whether you're at your desk, in the bedroom, or on the road, this whisper-quiet ultrasonic humidifier keeps the air around you feeling fresh and comfortable — all while casting a soft, colorful ambient glow that sets the perfect mood.

Made in Mainland China.

Key Features

• 420ml Water Tank – Large enough for 2–3 hours of continuous misting on a single fill, so you can enjoy uninterrupted comfort throughout the day or night.
• Two Spray Modes – Choose between continuous spray for steady moisture output or intermittent spray to conserve water and extend run time — switched with a single button press.
• Ultrasonic Cool Mist Technology – Produces a fine, cool mist that disperses quickly and evenly without heating the water, making it safe and energy-efficient at just 3W.
• Aroma Oil Compatible – Add a few drops of your favourite essential oil to the water for a relaxing aromatherapy experience at home or in the car.
• Colorful Soft Night Light – Built-in low-brightness ambient LED light creates a cozy atmosphere without disturbing your sleep — perfect for bedside use.
• Auto Power-Off Safety – Automatically shuts off when the water level runs low, giving you complete peace of mind.
• Ultra-Quiet Operation – Runs at under 36dB, so it won't disrupt your focus, rest, or conversations.
• USB Powered – Operates at 5V via any standard USB port — compatible with laptops, power banks, car chargers, and USB wall adapters.
• Compact & Portable – Lightweight and travel-friendly design fits easily on a desk, nightstand, car cup holder, or waiting room table.

Where Can You Use It?

This versatile humidifier is ideal for a wide variety of settings:

• Home office or desk
• Bedroom or nursery
• Car or commute
• Waiting rooms or reception areas
• Outdoor tabletop use

Specifications

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Learn more: NIH on aromatherapy and essential oils

Frequently Asked Questions

Q: How long does the 420ml USB humidifier run on a full tank?

A: On a full 420ml tank, the humidifier runs for approximately 2–3 hours in continuous spray mode. Switching to intermittent spray mode will extend the run time significantly, making it ideal for overnight or all-day use.

Q: Can I use essential oils in this cool mist humidifier?

A: Yes! This humidifier is aroma oil compatible. Simply add a few drops of your preferred essential oil to the water tank to enjoy a gentle aromatherapy mist throughout your space.

Q: Is it safe to leave the humidifier running overnight?

A: Absolutely. The built-in auto power-off feature shuts the unit down automatically when the water level drops too low, preventing any risk of dry running. The soft night light mode and ultra-quiet operation (under 36dB) also make it perfectly suited for nighttime use.

Q: What power source does this USB humidifier need?

A: It runs on a standard 5V USB connection, so you can power it from a laptop, USB wall adapter, power bank, or car USB port — making it truly portable and versatile wherever you go.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.