4L USB Cool-Mist Humidifier with Aroma Function – Portable

4L Cool-Mist Humidifier with Aroma Function – USB Portable for Home, Office & Hotel

Transform your indoor environment with this whisper-quiet 4L USB Cool-Mist Humidifier. Powered via a simple 5V USB connection, it delivers a steady, fine mist that gently restores moisture to dry air — making your home, office, hotel room, or workspace feel noticeably more comfortable. With a built-in aroma diffuser function, you can also add your favourite essential oils for a calming, fragrant atmosphere.

Why You'll Love It

• Large 4L Water Tank – Long runtime between refills, ideal for overnight or all-day use.
• Ultra-Quiet Operation – Runs at under 36 dB, so it won't disturb your sleep, work, or relaxation.
• Aroma Diffuser Function – Add a few drops of your favourite essential oil for a refreshing, fragrant mist.
• Cool-Mist Impeller Technology – Produces a consistent, fine mist without heating the water, making it safe and energy-efficient (just 1W).
• USB 5V Powered – Plugs into any USB port, power bank, laptop, or wall adapter for flexible placement at home or on the go.
• Portable Tabletop Design – Compact dimensions (180 × 318 mm, 1.4 kg) fit neatly on a desk, nightstand, or countertop.
• Humidistat Control – Built-in humidity sensing helps maintain a balanced, comfortable moisture level.
• 220 mL/h Mist Output – Efficiently humidifies small to medium-sized rooms.
• 1-Year Warranty – Backed by a full 12-month factory warranty with free spare parts after-sales support.
• Made in China – Manufactured in Zhejiang, China.

Key Specifications

Perfect For

• Bedrooms, living rooms, home offices, and hotel rooms
• Anyone who enjoys aromatherapy alongside balanced humidity
• Travellers and remote workers needing a portable, USB-powered solution
• Spaces that feel dry due to air conditioning or central heating

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Learn more: NIH on aromatherapy and essential oils

Frequently Asked Questions

Q: What is the water tank size of this USB humidifier?

A: The humidifier features a generous 4-litre water tank, allowing for extended runtime between refills — great for overnight or continuous daytime use without constant topping up.

Q: Can I use essential oils in this humidifier?

A: Yes! This model includes a built-in aroma function, allowing you to add a few drops of your favourite essential oil to enjoy a fragrant, moisturised atmosphere alongside the cool mist output.

Q: How does the USB 5V power connection work?

A: The humidifier is powered via a standard 5V USB connection, meaning you can plug it into a USB wall adapter, laptop, desktop, or power bank — no specialist power supply needed. It operates at just 1W, making it extremely energy-efficient.

Q: Is this humidifier suitable for bedroom use at night?

A: Absolutely. With a noise level of under 36 dB, this cool-mist humidifier runs virtually silently, making it well-suited for use in bedrooms, nurseries, or any quiet space where undisturbed rest is important.

Q: What warranty does this humidifier come with?

A: This humidifier is backed by a 1-year factory warranty that includes free spare parts, giving you added peace of mind with your purchase.

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.