Mini 300ml USB Cool Mist Humidifier – Auto Shut-Off & Quiet

Mini USB Cool Mist Humidifier – Portable, Quiet & Safe for Any Space

Bring comfortable moisture levels to your bedroom, office desktop, or car with this compact 300ml Ultrasonic Cool Mist Humidifier. Powered by just 3W via USB, it runs whisper-quietly at under 36dB — so you can sleep, work, or drive without distraction. Its smart auto shut-off kicks in when the water runs low, giving you total peace of mind.

Why You'll Love It

• Ultrasonic Cool Mist Technology – Produces a fine, gentle mist that helps maintain balanced humidity without heating the water, making it energy-efficient and safe to the touch.
• Whisper-Quiet Operation (<36dB) – Nearly silent so it won't disturb sleep, concentration, or conversation.
• Auto Shut-Off Safety Feature – Automatically powers off when the tank is empty, protecting both the device and your surfaces.
• USB Powered (5V / 3W) – Plug into any USB port: laptop, power bank, car charger, or wall adapter for ultimate portability.
• Compact & Travel-Ready – Slim, lightweight design fits on a nightstand, desk corner, or car cupholder with ease.
• Wick Filter System – Helps deliver clean, consistent mist output for a fresher environment.
• No High-Concern Chemicals – Confirmed free from high-concern chemical substances for everyday use confidence.

Specifications

Perfect For

• Bedrooms – enjoy a calm, comfortable atmosphere while you sleep
• Home office desktops – maintain a refreshing work environment
• Car interiors – a quick USB connection keeps the air feeling fresh on the go
• Travel – compact enough to pack in a bag or suitcase

You May Also Like

Keep your space organized and functional alongside your new humidifier:

• Self-Draining Leaf Soap Dish – Waterfall Soap Holder, Easy Clean
• Large Soft Absorbent Hand Towel – Cute Smiling Face Design
• 10-Pack Silicone Cable Ties – Reusable Cord Organizers

Learn more: MedlinePlus on healthy sleep

Frequently Asked Questions

Q: What is the water tank capacity of this mini humidifier?

A: The mini ultrasonic cool mist humidifier has a 300ml water tank, making it ideal for personal use on a desktop, nightstand, or in a car. It provides several hours of continuous mist output before needing a refill.

Q: Does this humidifier turn off automatically when it runs out of water?

A: Yes! The built-in auto shut-off feature detects when the tank is empty and powers the unit off automatically, protecting the device and giving you added safety — especially useful overnight or during long work sessions.

Q: How do I power this humidifier?

A: It's USB powered at 5V / 3W, so you can plug it into any standard USB port — including laptop USB ports, wall adapters, power banks, or car USB chargers — making it truly portable and versatile.

Q: How quiet is this humidifier during operation?

A: The ultrasonic technology keeps noise levels below 36dB, which is quieter than a whisper. It's well-suited for use in bedrooms while sleeping or at a desk while working or studying.

Q: Can I use this humidifier as an aromatherapy diffuser?

A: This unit is primarily designed as a cool mist humidifier. If you'd like to add a fragrance, use only water-soluble essential oils specifically recommended for ultrasonic diffusers and always check the manufacturer's guidelines to avoid damage to the wick filter.

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.