Portable USB Desktop Air Cooler Fan – 3-Speed 380ml Water Tank

Beat the summer heat without cranking up the central AC. The Shunmaii Portable USB Desktop Air Cooler is a compact 3-in-1 personal cooling solution that works as a fan, humidifier, and air purifier — all from a single desk-friendly unit. Simply fill the 380ml water tank, plug in via USB, and enjoy a refreshing cool breeze within seconds. Made in Mainland China.

Why You'll Love It

• Instant Summer Relief: Water-cooled evaporative technology rapidly lowers the air temperature around you, creating a personal cool zone right at your desk, bedside table, or workspace.
• 3 Adjustable Speed Settings: Choose between Low (2.0 m/s), Mid (2.71 m/s), and High (3.42 m/s) airflow to match your comfort level — whether you need a gentle breeze or a stronger gust.
• 380ml Removable Water Tank: The generously sized, detachable tank provides up to 3–8 hours of continuous cooling on a single fill (depending on ambient humidity). Easy to refill and clean.
• 3-in-1 Multifunctional Design: Functions simultaneously as a personal fan, mini air purifier, and humidifier — adding gentle moisture to the air for healthier, more comfortable breathing.
• Honeycomb Air Inlet: The specially designed honeycomb-style intake filters out dust and airborne particles, delivering cleaner, fresher airflow to your personal space.
• Built-In Warm Night Light: A soft, soothing ambient glow makes this cooler perfect for nighttime use — create a calming atmosphere while staying cool as you sleep.
• Ultra-Quiet Operation: Whisper-quiet at just 30dB on low speed (rising to 46dB on high), so it won't disturb your focus, meetings, or sleep.
• USB Powered & Energy Efficient: Draws only 1W–5W (DC 5V input) — plug into any laptop, power bank, USB wall adapter, or desktop USB port for flexible, cord-free convenience.

Technical Specifications

Perfect For

Home offices, dorm rooms, bedrooms, study desks, cubicles, and any personal space where a full-size air conditioner isn't practical. Ideal for anyone who wants targeted personal cooling without the energy cost of central air.

You May Also Like

• 140W USB-C Fast Charger with Auto Power-Off Overcharge Protection – Power your cooler and devices safely.
• 140W Auto-Eject USB-C Cable – Anti-Overcharge Battery Guard – A reliable USB cable for all your desktop needs.

For guidance on staying cool and safe during hot weather, visit the CDC's Extreme Heat Safety page.

Note: Due to individual monitor settings and lighting conditions, the actual product color may differ slightly from images. Please allow a 1–2 cm variance in measurements due to manual measuring.

Frequently Asked Questions

Q: How does the USB desktop air cooler cool the air?

A: This portable air cooler uses evaporative water-cooling technology. Water from the 380ml tank is drawn through a cooling pad; as the fan pulls warm air through the wet pad, evaporation lowers the air temperature, delivering a noticeably cooler and slightly humidified breeze to your personal space — similar in principle to how sweating cools the body.

Q: How long does the 380ml water tank last on a single fill?

A: The water tank provides approximately 3 to 8 hours of continuous cooling per fill. The exact duration depends on your selected fan speed and the ambient humidity in your environment — drier conditions mean faster evaporation and shorter run times, while more humid environments extend the tank life.

Q: What do I need to power this portable desktop fan?

A: The cooler runs on DC 5V USB power (0.2A–1.4A, consuming just 1W–5W). You can plug it into any standard USB port — including a laptop, desktop computer, USB wall adapter, or USB power bank — making it extremely versatile and energy-efficient.

Q: Is the USB air cooler suitable for use while sleeping?

A: Yes! On the lowest speed setting the unit operates at just 30 dB — quieter than a whisper — making it ideal for bedroom use. The built-in warm night light also adds a gentle ambient glow without being disruptive, helping you stay cool and comfortable through the night.