HUMIDIFIER: It humidifies while it cools your personal breathing space so you can stay cool and breathe moist, humid air wherever you need it. LARGE WATER TANK: The built-in water level sensor can hold up to 500ml of water and can run for 4 to 6 hours. The water tank is detachable and can be easily disassembled and cleaned after use to prevent mold and bacteria. LONG HOURS OF RELAXING: Long-lasting (can run up to 8 hours on high, 10 hours on medium & 12 hours on low) 3 STAGES OF COOLING ( High / Medium / Low): This lightweight and portable unit are compact enough to take with you wherever you need it - simply charge it up with the USB and go! FRESH BREEZE IN SUMMER: Enjoy cool, clean air all around your home, wonderful on humid days when you can't keep cool.